4878M09500 Wiseco Std Front Piston for Yamaha Road Star 1600 1999-03 95mm

Wiseco Std Front Piston for Yamaha Road Star 1600

This standard bore front piston for Yamaha Road Star 1600 is a rebuild component that restores compression and piston fit to the 1600cc V-twin front cylinder, cross-referencing OEM number 4878M09500 with a 95mm bore and 10.5:1 compression ratio.

Overview

This Wiseco standard front piston serves riders rebuilding the front cylinder of a Yamaha Road Star 1600. The 95mm standard bore and 10.5:1 compression ratio keep OEM displacement while refreshing worn internals for the 1999-03 model run. It suits DIY mechanics and shops handling a single-cylinder or full top-end rebuild.

Built For Performance

• 95mm standard bore piston matched to the OEM cylinder size
• 10.5:1 compression ratio for the Road Star 1600 front cylinder
• Forged piston construction for strength under heat and load
• Front cylinder application for the 1999-03 Road Star 1600
• Cross-references OEM number 4878M09500 for easy lookup

Fits These Machines

• for Yamaha Road Star 1600, 1999-03

On-The-Job Use

• Front cylinder top-end rebuild after wear or scoring
• Restoring compression on a high-mileage V-twin cruiser
• Shop or home garage engine refresh
• Standard bore rebuild that keeps original displacement

Specs At A Glance

Good To Know

Q: Does this piston fit the rear cylinder too? A: This listing is the standard front piston, so confirm the correct position and part number before ordering both sides.

Q: Can I install this without checking ring end gap? A: Ring end gap should always be measured and adjusted to spec during assembly to avoid poor sealing or seizure.

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