Vertex VTKTC22915C Forged Top End Kit - Standard Bore 94.95mm, 12.5:1 Compression | High-Performance Engine Upgrade for Motorcycles & ATVs | Ideal for Racing, Off-Road & Performance Tuning

Bore: 94.95mmCompression: 12.5:1 CompressionSizing: Standard BoreAll piston skirts are coated with a hightech Molybdenum Disulfide coating for faster break-in time and increased piston life. New T-box forgings and DLC coated wrist pins on forged pistons with highest compression ratios for increased strength and performance. Cast piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston.. Forged pistons are forged from 2618 aluminum for superior strength and durability.. Forged High Compression pistons improve power and torque across entire rpm range.. Forged Replica pistons are forged OE replacements. All pistons are heat treated with a T-5 hardening and tempering cycle.. Replica compatible with KTM 2-stroke pistons are factory supplied to compatible with KTM. All rings are OEM replacements.. Top end piston kit includes piston, rings, pins, circlips, top end gaskets, and wrist pin bearing or cam chain where applicable..This item fits the following vehicle applications:compatible with Yamaha WR450F 2003-2006compatible with Yamaha YZ450F 2003-2005