Wiseco Std Piston Crankshaft Gasket Set 77.00 mm for Yamaha YZ250F 2005-2007 12.

Wiseco Std Piston/Crankshaft/Gasket Set for Yamaha

This Wiseco Std Piston/Crankshaft/Gasket Set for Yamaha is a complete top and bottom end rebuild kit featuring a 77.00 mm standard bore piston at 12.5:1 compression, a crankshaft, and all necessary gaskets.

Overview

This Wiseco Std Piston/Crankshaft/Gasket Set for Yamaha delivers everything needed for a full engine rebuild on the YZ250F 2005-2007. The 77.00 mm standard bore piston at 12.5:1 compression restores factory-spec power, while the included crankshaft and gasket set simplify ordering. It suits riders and mechanics performing scheduled top and bottom end service.

Built For Performance

• Forged piston construction for high-strength durability
• 77.00 mm standard bore size for stock cylinder fitment
• 12.5:1 compression ratio for responsive power delivery
• Crankshaft included for complete bottom end service
• Full gasket set for a sealed, leak-free rebuild

Fits These Machines

• for Yamaha YZ250F 2005
• for Yamaha YZ250F 2006
• for Yamaha YZ250F 2007

On-The-Job Use

• Top end rebuilds after piston wear or seizure
• Bottom end service when crankshaft bearings fail
• Routine engine refresh for motocross race bikes
• Restoring stock compression after a rebuild

Specs At A Glance

Good To Know

Q: Does this kit include everything for a full rebuild? A: Yes, it combines a standard bore piston, crankshaft, and gasket set for a complete top and bottom end service.

Q: Is this piston a stock or high-compression version? A: It is a standard bore 77.00 mm piston rated at 12.5:1 compression, matching the original engine specification.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.