Namura .040 Over Bore Piston Kit for Yamaha Timberwolf 250 fits 1992-2000 72mm

.040 Over Bore Piston Kit for Yamaha

This Namura .040 Over Bore Piston Kit is a replacement piston assembly for Yamaha Timberwolf 250 models from 1992 to 2000, featuring a 72mm bore size.

Overview

The Namura .040 Over Bore Piston Kit is designed to restore compression and performance in Yamaha Timberwolf 250 engines needing an oversize rebuild. This aftermarket kit includes a precision-machined piston, rings, and wrist pin for a complete top-end overhaul. It is an excellent choice for ATV owners looking to refresh their engine after wear or damage.

Built For Performance

• 72mm bore diameter for .040 oversize application
• High-strength aluminum alloy piston construction
• Includes premium piston rings for optimal sealing
• Precision wrist pin with circlips included
• Designed to match original equipment compression specifications

Fits These Machines

• for Yamaha Timberwolf 250 (1992-2000)

On-The-Job Use

• Rebuilding top end of Yamaha Timberwolf 250 engine
• Replacing worn piston after high mileage or damage
• Restoring lost power and compression in ATV engine
• Performing a .040 overbore to clean up cylinder wear
• Upgrading to a fresh piston during engine overhaul

Specs At A Glance

Good To Know

Q: Do I need to bore my cylinder for this .040 over piston kit? A: Yes, the cylinder must be bored to .040 over the original diameter to match this piston.

Q: Does the kit include a cylinder head gasket? A: No, the kit includes only the piston, rings, and wrist pin. Gaskets must be purchased separately.

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