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 28 grams per set of KPMI® 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

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® Suzuki® parts, go to our Suzuki® GSX-1300R Hayabusa Section​

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 Yamaha® YZ250F  2014-2017 Section​

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 Suzuki® GSX-1300R Hayabusa Section​

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