Namura .040 Over Bore Top End Rebuild Kit for Yamaha Bruin 250 2005-2006 72mm

Namura .040 Over Bore Top End Rebuild Kit for Yamaha Bruin 250 2005-2006 72mm

This Namura .040 over bore top end rebuild kit supplies all the necessary parts to overhaul the upper cylinder of a Yamaha Bruin 250 from 2005 to 2006, using a 72mm bore size.

Overview

The Namura .040 over bore top end rebuild kit is a comprehensive set of components to restore compression and power in Yamaha Bruin 250 ATVs from 2005 through 2006. This top end rebuild kit includes a piston, rings, wrist pin, and circlips for a complete top end overhaul after boring the cylinder. It is designed for DIY mechanics and shops rebuilding the Bruin 250 engine.

Built For Performance

• Precision-cast piston for reliable compression
• Includes .040 over bore piston rings for a tight seal
• Heat-treated wrist pin for durability
• Includes all necessary circlips for secure assembly

Fits These Machines

• for Yamaha Bruin 250 2005-2006

On-The-Job Use

• Trail riding and utility work on ATVs
• Engine rebuilds after wear or damage
• Restoring lost power in older machines

Specs At A Glance

Good To Know

Q: Do I need to re-plate the cylinder? A: This kit is for use after a .040 overbore; if your cylinder is not already bored, you will need to have it machined to 72mm.

Q: Is the kit compatible with the original cylinder head? A: Yes, this top end rebuild kit works with the stock cylinder head as long as the head gasket is replaced.

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