• Durability, longevity and increased horsepower
• Innovative forging design and piston skirt provide maximum horsepower and torque
• Lightweight wrist pins enable faster revs and quicker throttle response
• Contain all the necessary components for overboring or rebuilding your top end
• SCEM Composite-Cylinder resleeving or replating required for oversizes
• Cylinder sleeves must be purchased separately


Included items:
(1) 642M06700 piston kit
(1) B1014 top end bearing
(1) W5431 top end gasket set

Our pistons, rings and kits are sold by application and bore size. Please note that STANDARD and OVERSIZES are not indicated. To get the correct part, you must know the standard bore size to make sure you are ordering either the standard or correct amount of oversize that you need. If you have any questions, please call Technical Service.

(1) Piston

(1) Wrist pin

(2) Cir-clips

(1) Top ring

(1) Second ring

(1) 18x23x21.8 Needle bearing

(4) O-Rings (assorted sizes)

(1) Base gasket

(1) Intake reed gasket

(2) Power valve gaskets

No instructions