Overbore 339.43cc Piston Kit: This is a complete kit, 2mm High Compression piston kit (339.43cc).
They stock OEM cylinder is bored and the cylinder service this is a proprietary Nickel Silicon Carbide (NSC) cylinder plating process and cylinder services. This NSC process is so superior to factory plating that Millennium Technologies is often used by professional race teams all over the world to re-plate brand new OEM cylinders. Millennium stands behind our plating with a LIMITED LIFETIME WARRANTY.
Overbore 339.43cc Piston Kit: This is the new 2 Ring FSR Slipper Skirt forging Piston made for Spears by CP Carrillo. This 2mm over kit includes pistons, rings, lighter wrist pins, cir clips . The compression is 13 to 1. At the forefront of performance, piston manufacturing has been a result of continuous research and development of unique materials, piston designs and technologies. Utilizing State of the Art CNC machines for manufacturing, along with purpose-designed forgings, while being able to maintain exacting specifications on each and every piston – holding tolerances to millionths of an inch.
Each Kit comes with a OEM Yamaha base and custom plus 2mm over head Gasket to a special thickness . Spears Racing’s designs are specifically engineered for extreme applications including professional competition. Comp Ratio 13.0:1.This is a 2 ring design piston
***Core Deposit on Cylinder will be added if not available***