Vertex VTK24212B Cast Replica Top End Piston Kit - Standard Bore 46.95mm, Standard Compression fuel-air-carburetors-accessories-choke-plugs 1988-1990 Yamaha YFM350ER Moto-4

1988-1990 Yamaha YFM350ER Moto-4

New light pod design for improved water and dust resistance

No body modifications needed

Improves clutch performance

Greater secondary acceleration as primary acceleration increases

Vertex VTK24212B Cast Replica Top End Piston Kit - Standard Bore 46.95mm, Standard Compression fuel-air-carburetors-accessories-choke-plugs 1988-1990 Yamaha YFM350ER Moto-4Bore: 46. 95mm Compression: Standard Compression Sizing: Standard Bore All pistons are heat treated with a T 5 hardening and tempering cycle. All piston skirts are coated with a high tech molybdenum disulphite coating for faster break in time and increased piston life. 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