Namura .040 Over Bore Top End Rebuild Kit for Yamaha Big Bear 250 2007-2009 72mm

Namura .040 Over Bore Top End Rebuild Kit for Yamaha

This top end rebuild kit is designed for the Yamaha Big Bear 250 models from 2007 to 2009, featuring a 72mm bore and .040 oversize, providing all components needed for a complete top end overhaul.

Overview

The Namura .040 over bore top end rebuild kit delivers a complete solution for restoring compression and performance in your Yamaha Big Bear 250. This top end rebuild kit includes piston, rings, pin, and gaskets engineered to match the 72mm bore specification. Whether tackling a rebuild or replacing worn components, this top end rebuild kit is the reliable choice for your ATV.

Built For Performance

• High-quality aluminum alloy piston for durability
• Precision-machined cylinder bore ensures proper fit
• Durable chrome-plated piston rings reduce wear
• Complete gasket set included for a thorough rebuild
• .040 oversize increases displacement for added power
• Direct replacement fit for stock components

Fits These Machines

• for Yamaha Big Bear 250 2007
• for Yamaha Big Bear 250 2008
• for Yamaha Big Bear 250 2009

On-The-Job Use

• Trail riding and recreational ATV use
• Utility work such as hauling and towing
• Hunting and off-road exploration
• Farm and ranch maintenance tasks
• General ATV performance restoration

Specs At A Glance

Good To Know

Q: Is this kit compatible with a stock cylinder? A: The kit is designed for use with a cylinder bored to .040 oversize; ensure your cylinder is machined accordingly.

Q: Does this kit include installation instructions? A: Professional installation is recommended; basic instructions may be included but always refer to the service manual.

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