77mm Stock Bore Cylinder Piston Top End Rebuild Kit For Yamaha WR250F 2001-2013

77mm Stock Bore Cylinder Piston Top End Rebuild Kit for Yamaha

This cylinder piston rebuild kit provides all necessary components to restore factory compression and engine power to your motorcycle.

Overview

This top end rebuild kit for Yamaha contains everything required to refresh your dirt bike engine. The top end rebuild kit for Yamaha features a standard 77mm bore size to preserve stock displacement. It serves as a direct replacement package to renew compression and performance on worn motors.

Built For Performance

• Cast aluminum cylinder sleeve provides efficient heat dissipation
• Piston is designed for optimal strength-to-weight ratio
• Premium gaskets resist high pressures and combustion heat
• Stock 77mm bore maintains original engine displacement
• Precision-machined piston rings ensure positive compression seal

Fits These Machines

• for Yamaha WR250F 2001-2013

On-The-Job Use

• Rebuilding worn engines during scheduled off-season maintenance
• Restoring compression after loss of engine power
• Replacing scored cylinder walls and worn pistons

Specs At A Glance

Good To Know

Q: Is boring or sleeving required for this cylinder? A: No, this is a stock-bore replacement kit designed to bolt directly on without machining.

Q: Should I lubricate the piston during installation? A: Yes, apply a thin coat of clean engine oil to the piston, rings, and cylinder wall before assembly.

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