KPMI® Manganese Bronze Valve Guides for Various HD® Applications
• Standard or +0.001" Oversized Manganese Valve Guides, kited with seals at a savings
To learn more about these Kibblewhite® C674 Bronze Valve Guide Kits, go to
HD® Valve Guide Kits
+2.50 and +3.00 mm White Diamond® & Inconel® Valves for HD® Milwaukee-Eight 2017-2026
• Superior Quality Stainless Intakes and Inconel* Exhausts
• +2.50mm and +3.00mm Oversize Head Diameters
We fully CNC machine our White Diamond® Valves from a one-piece forging of either EV8 Stainless Steel or Inconel-751. These materials have proven heat and corrosion resistance properties. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Strict attention is paid to the surface preparation of the valves, and the purity of the chrome is closely monitored. A 360 degree anode is used to produce the highest possible grade of hard chrome finish. White Diamond® Valves are light, strong with profiles that provide excellent flow characteristics.
*Inconel® is classified as a “Super Alloy”, meaning that it is designed to survive under the most extreme temperatures and pressures where other valves will begin to burn, corrode, or completely fail. This is the material of choice for high output engines running turbos, superchargers, nitromethane, or nitrous.
To learn more about these Kibblewhite® Saddlebag Stabilizer and other valvetrain related components, go to
KPMI® High Chrome Seats for HD® Milwaukee-Eight 2017-2026
• 18-22% Chromium for resistance to abrasion, corrosion, and deformation
• 1-2% Nickel content, which lends to corrosion-resistance and toughness
• Machined from solid bar stock and ground to exacting tolerances
• The alternative to Powder Metal
• Machines as a continuous chip
• Use KPMI® “High Chromium Seats” for your next gasoline or diesel engine rebuild
To learn more about these Kibblewhite® High Chrome Seats and other valvetrain related components, go to
High Chrome Seats
3nd Round Top End Service Kits - Stainless Conversion for Suzuki® LTR™ 450 and Yamaha® YFZ™ 450 / 450R Applications
ALL KIT CONTENTS
• High Compression Racing Piston with Coated Skirt (with rings and pin)
• Top End Gasket Kit (Head Gasket, Base Gasket, Exhaust Gasket, Cam Chain Tensioner Gasket, Valve Stem Seals, Cylinder Head Drain Seal)
• Std. Black Diamond™ or White Diamond® Stainless Valves
• Lightweight Racing Spring Kit (Titanium Retainers, Dual Springs, H.T. Steel Basewashers)
FEATURES
• Designed specifically for the performance demands of popular racing MX Bikes and Quads.
• Pistons designed to maintain the stock compression after the effects of the dished stainless valves
• 2618 Alloy Fully CNC Machined Piston with performance skirt coating
• Black Diamond™ and White Diamond® Stainless Steel Conversion system significantly increases valve durability
• Lightweight Racing Spring Kit Compatible with high performance cams
• All of the gaskets, rings, pins and seals required for a top end rebuild
IMPORTANT NOTE: The piston, rings, valves and pin clips in this kit are designed to work together as a system. They are NOT COMPATIBLE with O.E.M. components and should ONLY be used with the components in this KPMI® Top End Service Kit.
To learn more about other Kibblewhite® Various Suzuki® and Yamaha® parts and accessories, go to
Suzuki® LTR 450R 2006-2009
Yamaha Various 450cc 2003-2020
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Lightweight Racing Valve Spring Kit and Components for Polaris® Various 4-Cylinders's 2020-2026
• These spring kits are compatible with the OEM tappet lash adjustment system and the KPMI® shim conversion tappets.
• KPMI® performance valve spring kits are modeled using cam profile and simulation softwares. By utilizing FEA software,
it was possible to take advantage of the increased strength and wear resistance of a heat treated steel retainer, while
reducing its mass to within grams of a comparable titanium retainer. With two different spring pressure option kits to
choose from, these are the ultimate setup for any Polaris RZR/Ranger tuner.
• The seals included in these kits are intended for use with OEM guides. Please use KPMI® P/N 71016-8 when installing
KPMI® guides. Some early 2013 models came from the OEM with guides that included a seal detail. These guides
require the use of KPMI® sealP/N 71015-8.
All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond™ process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
To learn more about these Kibblewhite® 0.640″ Lift Beehive Valve Spring Kits, w/ ‘PSI’ Springs and other valvetrain related components, go to Polaris® Various 4Cylinders's 2020-2026
Lightweight Racing Valve Spring Kit and Components for KTM® 350cc SX-F™ & XC-F™ 2016-2022
Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s high revving 4-stroke engines. The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®’s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a “unified system” approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well. Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few! Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.
We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high-temperature areas, which promotes high performance and endurance.
To learn more about these Kibblewhite® Saddlebag Stabilizer and other valvetrain related components, go to
KPMI® Generic Keeper, #51034-XXX for HD® Milwaukee-Eight 2017-2026
All KPMI® keepers are single-point machined from high tensile strength billet material (with the exception of forged styles). After machining, the keepers are split, tumbled and then heat treated. At KPMI® we pay close attention to the surface finish and tolerance of all diameters, taper angle, and bead location. This type of detail insures repeatability you can count on. All Kibblewhite® Keepers are sold in pairs of 4, 8, 16, 50, and 100.
To learn more about this Kibblewhite® Keeper and other valvetrain related components, go to
KPMI® H.T. Steel Cylinder Stud Kit for Suzuki® LT-Z 400 2003-2008 / D-RZ400E / S / SM 2000-2024
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• Both nut and stud are black oxide treated for enhanced corrosion resistance
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components for the various models, go to
Suzuki® LT-Z™ 400 2003-2008
Suzuki® D-RZ™ 400E/ S/ SM 2000-2024
Valve Spring Kit "Shim In Tappet" for Suzuki® GSX-R 1000 2007-2016
KPMI® shim in tappet systems locate the adjustment shim in the hardened steel of the tappet body, where it is impervious to wearing (ovalling) and kicking the shim out. By designing the tappet and Titanium retainer together as a system, the shim counterbore depth in the tappet has been maximized. This allows for increased insurance against losing the shim even in the event of valvetrain separation during severe operating conditions, over-revs, or extreme boost pressures.
These “Shim in Tappet” tappets solve the issues of retainer counter-bore ovaling and adjustment shims becoming dislodged. It is especially recommended for use with reduced base circle cams.
To learn more about these Kibblewhite® Valve Spring Kits with Shim in Tappet and other valvetrain related components, go to
Beehive Racing Valve Spring Kit and Components for Honda® Various 1000's Applications
By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI® has developed ovate wire Beehive style springs that will live and Perform at a high level in Honda® applications. By coupling these developments with strict KPMI® design protocols and employing multiple design, simulation, and FEA analysis software, we were we able to overcome the torsional stresses unique to ovate wire springs that previously severely limited their operating parameters. KPMI® Beehive Springs are progressively wound using Kobe Super-Clean chrome silicon based wire that is heat treated and shot peened. KPMI® uses its tightly toleranced, FEA designed hardened Titanium and H.T. Steel retainers in these applications to ensure correct assembly height and resist keeper pull through. The hardened steel basewashers included in these kits are designed to locate the spring and control lateral movement.
We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high-temperature areas, which promotes high performance and endurance.
We fully CNC machine our White Diamond® Valves from a one-piece forging of either EV8 Stainless Steel or Inconel-751. These materials have proven heat and corrosion resistance properties. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Strict attention is paid to the surface preparation of the valves, and the purity of the chrome is closely monitored. A 360 degree anode is used to produce the highest possible grade of hard chrome finish. White Diamond® Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics
To learn more about these Kibblewhite® Lightweight Racing Beehive Spring Kit and other valvetrain related components for the various models, go to
Honda® CRF™ 1000A/D 2017-2019
Lightweight Racing Valve Spring Kit and Components for Polaris® Various 570's 2014-2026
Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s high revving 4-stroke engines. The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®’s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a “unified system” approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well. Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few! Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.
These Engine Builder valve guides have been designed with the price conscious builder in mind. Expect the same exacting KPMI® tolerances, but with a reduced toughness / wear-ability when compared to premium C630 Nickel Aluminum Bronze valve guides. The softer Manganese guides are easily reamed, and then can be delicately finished with our high quality ball hones. Now, with any battery operated or electric drill you can ream and hone manganese valve guides in less time and in the absence of expensive honing equipment required to properly size tough Nickel Bronze guides.
All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond™ process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
To learn more about these Kibblewhite® Lightweight Racing Spring Kit and other valvetrain related components, go to
KPMI® Tensilite® Titanium Blank Valves for HD® Milwaukee-Eight 2017-2025
Kibblewhite® Tensilite® titanium valves are manufactured from solid U.S. milled titanium bar. The titanium bar is cut, and forged, and then the stem is pulled from the forging process and cross-sectionally reduced.
These one piece forgings made from 6AL4V or 6-2-4-2 titanium alloy reflect the latest developments in titanium valve alloys. These alloys have superior hardness, strength, and thermal characteristics. After final grinding and machining, Tensilite® valves are encased in a hard Chromium Nitride (CRN) shell. CRN offers excellent resistance to impact, abrasion and corrosion. These qualities and its low coefficient of friction make CRN the coating of choice for high performance titanium valves.
To learn more about these Kibblewhite® Tensilite Titanium Blank Valves and other valvetrain related components, go to
Harley-Davidson® Milwaukee-Eight 2017-2025
KPMI® H.T. Steel Cylinder Stud Kit for Suzuki® GXS-R 750 and 1000 Applications
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• Both nut and stud are black oxide treated for enhanced corrosion resistance
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components for the various models, go to
Suzuki® GXS-R 750 2004-2005
KPMI® H.T. Steel Cylinder Kits for Polaris® Various 570's and 900-1000's Applications
• Each kit include studs, nuts and washers to replace the OEM bolt
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• All studs, nuts and washers are black oxide treated for enhanced corrosion resistance
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components for the various models, go to
Polaris® Various 570's 2012-2015
Polaris® RZR™ XP 900 2011-2012
Polaris® RZR™ XP 900 2013-2014
Polaris® Various 900's 2013-2016
Polaris® RZR™ XP 1000 2014
Polaris® RZR™ XP1000 / RZR™ XP Turbo / RZR™ RS1 2015-'21
KPMI® High Chrome Seats for HD® Milwaukee-Eight 2017-2026
• 18-22% Chromium for resistance to abrasion, corrosion, and deformation
• 1-2% Nickel content, which lends to corrosion-resistance and toughness
• Machined from solid bar stock and ground to exacting tolerances
• The alternative to Powder Metal
• Machines as a continuous chip
• Use KPMI® “High Chromium Seats” for your next gasoline or diesel engine rebuild
To learn more about these Kibblewhite® High Chrome Seats and other valvetrain related components, go to
Harley-Davidson® Milwaukee-Eight 2017-2026
KPMI® H.T. Steel Std. OEM Dia. Cylinder Stud Kit for Honda® Various 450's 2002-2017
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• Both nut and stud are black oxide treated for enhanced corrosion resistance
• No Cylinder Head modification is required
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components for the various models, go to
Honda® CRF450R 2002-2008
4th Round Top End Service Kits - Stainless Conversion for Honda® CRF™ 450R/ RX/ WE 2017-2026
ALL KIT CONTENTS
• High Compression Racing Piston with Coated Skirt (with rings and pin)
• Top End Gasket Kit (Head Gasket, Base Gasket, Exhaust Gasket, Cam Chain Tensioner Gasket, Valve Stem Seals, Cylinder Head Drain Seal)
• Std. White Diamond® Stainless Valves
• Lightweight Racing Spring Kit (Titanium Retainers, Dual Springs, H.T. Steel Basewashers)
FEATURES
• Designed specifically for the performance demands of popular racing MX Bikes and Quads.
• Pistons designed to maintain the stock compression after the effects of the dished stainless valves
• 2618 Alloy Fully CNC Machined Piston with performance skirt coating
• Black Diamond™ and White Diamond® Stainless Steel Conversion system significantly increases valve durability
• Lightweight Racing Spring Kit Compatible with high performance cams
• All of the gaskets, rings, pins and seals required for a top end rebuild
IMPORTANT NOTE: The piston assembly (piston, rings, pin and pin clips) in this kit are designed to work together as a system. When used complete, the piston assembly can be used as an OEM replacement. The individual components are NOT INTERCHANGEABLE with O.E.M. piston assembly components.
To learn more about other Kibblewhite® Various Honda® CRF™ 450R/ RX/ WE parts and accessories, go to
Honda® CRF™450R/RX/WE 2017-2026
Saddle Bag Stabilizer - M8 Low Rider ST - All
KPMI® is proud to introduce a precision solution for Low Rider ST saddlebags. Due to a lack of mounting support, the OE saddlebags are susceptible to shaking and vibration, particularly at high speeds. The KPMI® saddlebag stabilizer creates a direct link between both bags and significantly strengthens the system, reducing the unwanted movement of the bags.
The stabilizer bar is CNC machined from 6061-T6 aluminum and Hard Anodized black for superior durability.
The included thumb screws allow for easy assembly and disassembly of the kit.
To learn more about these Kibblewhite® Saddlebag Stabilizer and other valvetrain related components, go to
KPMI® Tensilite® Titanium Intake Std. Valve for Suzuki® Hayabusa 1999-2024
• F.E.A. Designed 1Pc. 6-2-4-2 Titanium alloy Forgings
• Chromium Nitride(CRN) PVD Coating
• Low Coefficient of Friction
• Excellent Resistance to Impact, Abrasion and Corrosion
All titanium valves are 1 piece forged for superior strength over a 2 piece valve. The Tensilite PVD CrN coating is a state of the art process, which is much tougher than the OEM oxiding process.
To learn more about this Kibblewhite® Tensilite Titanium Valves and other valvetrain related components, go to
Suzuki® Hayabusa 1999-2024
KPMI® Tensilite® Titanium Blank Valves for HD® Milwaukee-Eight 2017-2026
Kibblewhite® Tensilite® titanium valves are manufactured from solid U.S. milled titanium bar. The titanium bar is cut, and forged, and then the stem is pulled from the forging process and cross-sectionally reduced.
These one piece forgings made from 6AL4V or 6-2-4-2 titanium alloy reflect the latest developments in titanium valve alloys. These alloys have superior hardness, strength, and thermal characteristics. After final grinding and machining, Tensilite® valves are encased in a hard Chromium Nitride (CRN) shell. CRN offers excellent resistance to impact, abrasion and corrosion. These qualities and its low coefficient of friction make CRN the coating of choice for high performance titanium valves.
To learn more about these Kibblewhite® Tensilite Titanium Blank Valves and other valvetrain related components, go to
Harley-Davidson® Milwaukee-Eight 2017-2026
KPMI® Rocker Shim Conv. System - Dual Spring for HD® Milwaukee-Eight 2017-2026
• Innovative design adds a Ø9.5mm hardened steel shim between the valve tip and rocker arm
• The Ø9.5mm shim increases allowable rocker wipe area for maximum valve lift
• Up to 0.675” valve lift compatibility
• Offered with either Titanium or H.T. Steel retainers
• Includes Heavy Duty 9° H.T. Steel Keepers, Ø9.5mm Steel Shim, and Red Viton® Seals
KPMI® Rocker Shim Conv. System - Beehive Spring for HD® Milwaukee-Eight 2017-2026
• Innovative design adds a Ø9.5mm hardened steel shim between the valve tip and rocker arm
• The Ø9.5mm shim increases allowable rocker wipe area for maximum valve lift
• Up to 0.625” valve lift compatibility
• Offered with either Titanium or H.T. Steel retainers
• Includes Heavy Duty 9° H.T. Steel Keepers, Ø9.5mm Steel Shim, Red Viton® Seals and a HT Steel Basewasher
KPMI® Lightweight Racing Valve Spring Kits for HD® Milwaukee-Eight 2017-2026
• Lightweight Racing Dual Spring Kits for 0.630” lift
• Retainers designed for optimum rocker cover clearance
• Offered with either Titanium or H.T. Steel retainers
• Includes Heavy Duty 9° H.T. Steel Keepers and Red Viton® Seals
To learn more about these Kibblewhite® High Chrome Seats and other valvetrain related components, go to
KPMI® H.T. Steel Cylinder Stud Kit for Suzuki® LTR 450 / 450Z 2006-2009
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• Both nut and stud are black oxide treated for enhanced corrosion resistance
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components, go to
Suzuki® LTR 450 / 450Z 2006-2009
KPMI® C674 Bronze Valve Guides for Polaris® Ranger™ 1000 Single Cam Non-XP & Pro XD 2020-2025
These Engine Builder valve guides have been designed with the price conscious builder in mind. Expect the same exacting KPMI® tolerances, but with a reduced toughness / wear-ability when compared to premium C630 Nickel Aluminum Bronze valve guides. The softer Manganese guides are easily reamed, and then can be delicately finished with our high quality ball hones. Now, with any battery operated or electric drill you can ream and hone manganese valve guides in less time and in the absence of expensive honing equipment required to properly size tough Nickel Bronze guides.
To learn more about these Kibblewhite® C674 Bronze Valve Guides, go to
Polaris® Ranger™ 1000 Single Cam Non-XP & Pro XD 2020-2025
+4.00mm White Diamond® & Inconel® Valves for HD® Milwaukee-Eight 2017-2026
• Superior Quality Stainless Intakes and Inconel* Exhausts
• +4.00mm Oversize Head Diameters
We fully CNC machine our White Diamond® Valves from a one-piece forging of either EV8 Stainless Steel or Inconel-751. These materials have proven heat and corrosion resistance properties. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Strict attention is paid to the surface preparation of the valves, and the purity of the chrome is closely monitored. A 360 degree anode is used to produce the highest possible grade of hard chrome finish. White Diamond® Valves are light, strong with profiles that provide excellent flow characteristics.
*Inconel® is classified as a “Super Alloy”, meaning that it is designed to survive under the most extreme temperatures and pressures where other valves will begin to burn, corrode, or completely fail. This is the material of choice for high output engines running turbos, superchargers, nitromethane, or nitrous.
To learn more about these Kibblewhite® Saddlebag Stabilizer and other valvetrain related components, go to
Beehive Racing Valve Spring Kit and Components for Can Am® Maverick™ R 2024-2026
By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI® has developed ovate wire Beehive style springs that will live and Perform at a high level in Honda® applications. By coupling these developments with strict KPMI® design protocols and employing multiple design, simulation, and FEA analysis software, we were we able to overcome the torsional stresses unique to ovate wire springs that previously severely limited their operating parameters. KPMI® Beehive Springs are progressively wound using Kobe Super-Clean chrome silicon based wire that is heat treated and shot peened. KPMI® uses its tightly toleranced, FEA designed hardened Titanium and H.T. Steel retainers in these applications to ensure correct assembly height and resist keeper pull through. The hardened steel basewashers included in these kits are designed to locate the spring and control lateral movement.
We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high-temperature areas, which promotes high performance and endurance.
We fully CNC machine our White Diamond® Valves from a one-piece forging of either EV8 Stainless Steel or Inconel-751. These materials have proven heat and corrosion resistance properties. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Strict attention is paid to the surface preparation of the valves, and the purity of the chrome is closely monitored. A 360 degree anode is used to produce the highest possible grade of hard chrome finish. White Diamond® Valves are light, strong, one piece forgings with profiles that provide excellent flow characteristics
To learn more about these Kibblewhite® Beehive Racing Beehive Spring Kit and other valvetrain-related components for the various models, go to
KPMI® Generic Red Viton Seals, #71049-XXX
KPMI® Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI® Red valve stem seals are resistant to high temperatures, petroleum products and the corrosive gasses that are the by-products of combustion. These seals retain their ability to seal in situations where other materials could harden and allow oil to enter the combustion chamber causing detonation, carbon build up and a loss of power. The Red Ones are truly the racers choice.
To learn more about these Kibblewhite® Generic Seals and other valvetrain related components, go to
KPMI® H.T. Steel Cylinder Kit for Yamaha® Various 450's 2006-2020
• Each kit include studs, nuts and washers to replace the OEM bolt
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• All studs, nuts and washers are black oxide treated for enhanced corrosion resistance
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components for the various models, go to
Yamaha® Various 450's 2003-2020 (Dirt)
0.640″ Lift Beehive Valve Spring Kits, w/ ‘PSI’ Springs for HD® Milwaukee-Eight 2017-2025
• KPMI® designed and custom wound 0.640” lift springs manufactured by Performance Springs Inc.
• Lightweight Titanium or Heat Treated Steel Retainers and Beehive Springs reduce reciprocating mass while providing
the spring forces required for high-lift camshaft and sustained high rpm’s
• Ultra strong high angle 9° HT Steel keepers resist “pull thru”
• KPMI® made OEM replacement seals, #71046-8 are included for a more complete performance valvetrain solution
To learn more about these Kibblewhite® 0.640″ Lift Beehive Valve Spring Kits, w/ ‘PSI’ Springs and other valvetrain related components, go to Harley-Davidson® Milwaukee-Eight 2017-2025
KPMI® H.T. Steel Cylinder Stud Kit for Honda® CRF 450R/ RX/ WE 2017-2026
• Nuts are machined from billet high tensile steel and heat treated
• Studs are heat treated 180,000 PSI aircraft alloy steel
• Both nut and stud have rolled threads for the strongest possible threads
• Both nut and stud are black oxide treated for enhanced corrosion resistance
To learn more about these Kibblewhite® H.T. Steel Cylinder Stud Kit and other valvetrain related components for the various models, go to
Honda® CRF 450R/ RX/ WE 2017-2026
Lightweight Racing Valve Spring Kit and Components for Indian ® Scout™ 4V 1200's 2015-2019
The KPMI® spring kit includes dual springs designed with attention paid to natural frequencies to avoid cam harmonics, FEA designed lightweight titanium retainers to reduce reciprocating mass, and hardened steel bases to keep the spring where it belongs. This kit is capable of handling high RPM and up to .450 valve lift!
Coupling this kit with KPMI® Black Diamond™ Valves and Manganese bronze guides has proven to be a race winning combination.
• These spring kits are compatible with the OEM tappet lash adjustment system and the KPMI® shim conversion tappets
• The seals included in these kits are intended for use with OEM guides. Please use KPMI® P/N 71016-8 when installing
KPMI® guides
We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high-temperature areas, which promotes high performance and endurance.
All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond™ process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
To learn more about these Kibblewhite® Lightweight Racing Spring Kit and other valvetrain related components, go to
Lightweight Racing Valve Spring Kit and Components forHonda® and Kawasaki® Various 250's 2018-2021
Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s high revving 4-stroke engines. The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®’s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a “unified system” approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well. Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few! Today KPMI® proudly offers complete high performance lightweight valve spring kits for a host of applications.
We choose to use the copper based C63000 nickel-aluminum bronze as a material to make our bronze valve guides because of its ideal characteristics for the application. The 5% nickel content provides superior resistance to wear, and the approximately 80 percent copper content delivers outstanding heat conductivity. KPMI® guide profiles are designed to have minimal effect on the airstream while maintaining critical cross sectional thickness in high-temperature areas, which promotes high performance and endurance.
All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond™ process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.
To learn more about these Kibblewhite® Lightweight Racing Spring Kit and other valvetrain related components, go to