Namura .020 Over Bore Top End Kit for Yamaha BearTracker 250 1999-2004 71.5mm

.020 Over Bore Top End Kit for Yamaha

The .020 Over Bore Top End Kit provides all parts needed to rebuild the top end of a Yamaha BearTracker 250 ATV, including a 71.5mm piston, rings, wrist pin, and gaskets designed for 1999-2004 models.

Overview

This .020 Over Bore Top End Kit for Yamaha is a complete solution for rebuilding the top end of BearTracker 250 engines. It contains an oversized piston, rings, pin, and gaskets to match a cylinder bored to .020 over. This kit is intended for 1999-2004 models to bring back full compression and power.

Built For Performance

• Oversized 71.5mm piston for .020 over bore application
• Precision-ground rings for optimal cylinder sealing
• Includes all necessary gaskets for a complete top end seal
• Wrist pin and clips for secure piston attachment
• Engineered to restore compression after cylinder wear

Fits These Machines

• for Yamaha BearTracker 250 (1999-2004)

On-The-Job Use

• Rebuilding top end after loss of compression due to cylinder wear
• Boring cylinder to .020 over and installing matching piston
• Restoring power on aging ATVs used for trail riding or work
• Replacing worn top end components during engine overhaul

Specs At A Glance

Good To Know

Q: Will this fit my 2002 BearTracker 250? A: Yes, this kit fits 1999-2004 Yamaha BearTracker 250 models when the cylinder is bored to .020 over (71.5mm). Confirm your cylinder bore before ordering.

Q: Do I need to machine my cylinder? A: Yes, this is an over bore kit; your cylinder must be bored to 71.5mm to accommodate the oversized piston.

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