Namura Standard Bore Piston Kit for Yamaha Raptor 350 YFM350R 2004-2013 83mm

Namura Standard Bore Piston Kit for Yamaha Raptor 350

The Namura Standard Bore Piston Kit provides a reliable replacement piston for Yamaha Raptor 350 YFM350R models from 2004 through 2013. This piston kit is crafted to restore engine performance and efficiency in your ATV. With an 83mm bore, the Standard Bore Piston Kit ensures a precise fit for your Yamaha Raptor 350.

Overview

This Standard Bore Piston Kit is a complete top‑end rebuild kit for Yamaha Raptor 350 YFM350R ATVs built between 2004 and 2013. It replaces the worn piston with an 83mm precision‑machined unit to bring back lost power and compression. Whether you are rebuilding for racing or recreational riding, this piston kit delivers dependable performance.

Built For Performance

• High‑strength aluminum alloy construction for long service life
• Includes piston rings, wrist pin, and circlips for a complete rebuild
• Machined to an accurate 83mm bore diameter
• Designed to handle the demands of high‑revving ATV engines
• Standard bore grade for stock cylinder compatibility

Fits These Machines

• for Yamaha Raptor 350 YFM350R (2004‑2013)

On‑The‑Job Use

• Sport ATV riding
• Trail cruising
• Dune riding
• Engine rebuilds for recreational use

Specs At A Glance

Good To Know

Q: Will this piston work with a stock cylinder? A: Yes, the standard bore size is intended for stock cylinders; measure your cylinder bore before ordering to confirm it is within specification.

Q: What is included in the kit? A: The kit includes the piston, rings, wrist pin, and circlips – everything needed for the top‑end rebuild.

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