Namura .020 Over Piston Kit for Yamaha Big Bear 400 & 1993-1999 Kodiak 83.5mm

Namura .020 Over Piston Kit for Yamaha Big Bear 400 and Kodiak

This .020 over piston kit from Namura is a direct replacement for Yamaha Big Bear 400 and 1993-1999 Kodiak models, delivering reliable power and compression with an 83.5mm bore size.

Overview

The .020 over piston kit from Namura is engineered for Yamaha Big Bear 400 and Kodiak ATVs. This .020 over piston kit increases cylinder displacement slightly while maintaining OE specifications. Whether rebuilding or modifying, this .020 over piston kit provides a precise fit and long-lasting performance.

Built For Performance

• High-strength aluminum alloy construction for durability
• Precision-machined piston skirt and ring grooves
• Includes premium piston rings and wrist pin
• .020 over size compensates for cylinder wear
• 83.5mm bore diameter matches original specs

Fits These Machines

• for Yamaha Big Bear 400
• for Yamaha Kodiak 1993-1999

On-The-Job Use

• Trail riding and recreational ATV use
• Utility work on farms and ranches
• Hunting and outdoor exploration
• Engine rebuilds and performance modifications

Specs At A Glance

Good To Know

Q: Will this piston kit fit my 1995 Kodiak? A: Yes, this kit is designed for 1993-1999 Kodiak models, but always verify your engine serial number for compatibility.

Q: What does .020 over mean? A: It means the piston diameter is 0.020 inches larger than standard, commonly used when reconditioning a worn cylinder.

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