New H.T. Steel Retainers for Various  BSA® & Triumph® Applications

Brand new state of the art finite element analysis software has allowed the KPMI® engineering department to reduce the mass of our heat treated steel retainers. Lightening holes have been added to the steel retainers without sacrificing any strength or durability. All shoulders and cross sections were also analyzed for other opportunities to further reduce mass. These efforts led to mass reductions of up to 25% over the O.E.M. retainers. 

Kit Includes:
•  Springs, H.T. Steel Retainers, and Basewashers
 

To learn more about this Kibblewhite® New H.T. Steel Retainers for the various models, go to

BSA B250® 1968-1971

BSA B50® Goldstar™ 1971-1973

Triumph® 650 1963-1975

Triumph® 750 1973-1783​​

Cylinder Stud Kit, HT Steel, Oversized 1/2", Suzuki®, GSX-1300R™ Hayabusa™, 1999-2015

• 1/2″ Oversized studs for maximum strength, intended for high HP and forced induction applications
• High quality CNC machined, heat treated steel nuts. Also, the studs have rolled for maximum tensile strength
• 12-Point Nut pattern allows maximum power transmission and clearance when installing

Kit Includes:
•  10 Studs, 10 Nuts, and 10 Washers
 

To learn more about other Kibblewhite® Suzuki® parts, go to our www.kpmi.us Suzuki® GSX-1300R Hayabusa Section​


Racing Spring Kit, 0.515" Lift, Yamaha®, SR™/TT™/XT™ 500, 1976-1981

• Spring Kit is designed with increased spring rate and higher lift compatibility over the stock components

• CNC turned retainers and Cr-Si dual springs provide valvetrain control at high RPM with high performance camshaft compatibility
• This kit supersedes KPMI® spring only kit 80-0514, which is no longer available  

Kit Includes:
•  Springs, H.T. Steel Retainers, Keepers, and Shims
 

To learn more about other Kibblewhite® Yamaha® parts, go to our www.kpmi.us Yamaha® SR/TT/XT  Section​


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Piston System Includes Valvetrain for Yamaha® YZ250F 2014-2016

•  In order to maximize compression, the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves
•  The conversion to Black Diamond™ Stainless Steel Valves offers up to double the life over stock Titanium valves without  a loss in performance.

Kit Includes:
•  Piston, Rings, Clips and Pin
•  Top End Gasket Kit by Cometic
•  KPMI® S.S. Black Diamond™ Valves, Stock Head Dia.
•  Dual Spring Titanium Retainer Spring Kit, Which Allows for 0.395” In. and 0.370” Ex. Valve Lift

 

To learn more about other Kibblewhite® Yamaha® parts, go to our www.kpmi.us Yamaha® YZ250F  2014-2017 Section​

Nuts (Cylinder Stud), H.T. Steel , Honda®, CB™ 750 SOHC (Excluding F2™), 1969-1978

These nuts are manufactured from a high strength premium steel that promotes excellent surface finish and tight tolerances, two critical factors for achieving correct fit and torque. After machining, the nuts are heat treated to a specific depth. This creates hard, wear resistant working surfaces, while retaining a ductile core to prevent cracking under load. The premium black oxide treatment gives an excellent, corrosion resistant appearance.

Note:
•  Designed for Honda® CB750, but can be used for general purpose
 

To learn more about other Kibblewhite® Hondai® parts, go to our www.kpmi.us Honda® CB750 SOCH Section​


New Swing Arm Bushings for Various  Honda® Applications

• Replaces worn or damaged plastic O.E.M. bushing
• High quality bearing bronze offers increased durability and better fitment compared to O.E.M.
• O.E.M. P/N: 52108-457-300 & 52108-422-300

To learn more about this Kibblewhite® New Swing Arm Bushings for the various models, go to

CB550F 1975-1977

CB750 1969-1975

CBX 1979 Only

XL350 1976-1978

Yamaha® 1.8L 4V Watercraft 2008-2017 High Performance Lightweight Racing Spring Kit and Components

• Spring Kit is designed with increased spring rate and higher lift compatibility over the stock components
• Spring Kit is specifically designed for high boost / high RPM applications
• CNC'd Titanium Retainers and Cr-Si dual springs provide valvetrain control at high RPM with high performance camshaft compatibility


 ​To learn more about this Kibblewhite® high performance lightweight racing kit and other valvetrain related components,  go to
Yamaha® 1.8L 4V Watercraft 2008-2017 Components Section

Honda® CRF™ 250R 2016-2017 Lightweight Racing Spring Kit and Components

Since 1938, KPMI® has taken great pride in our ability to design innovative Performance improvements , valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits , 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 , these engines. Working together as a team enabled KPMI® to evolve with a "unified system" approach. In fact, these innovative High Performance lightweight Spring Kit, would not only outPerform factory parts, but outlive them as well. reach KPMI® spring kit is designed , 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 , a host of applications.
 

To learn more about this Kibblewhite® lightweight racing kit and other valvetrain related components,  go to Honda® CRF 250R 2016-2017 Components Section