40115M08500 Wiseco Std Piston Kit for Yamaha Bolt 950 2014-2021 85mm 10.5:1

Wiseco Std Piston Kit for Yamaha Bolt 950

This Wiseco standard bore piston kit (part 40115M08500) is a high-compression replacement assembly for Yamaha Bolt 950 models, featuring an 85.00mm bore and 10.5:1 compression ratio for dependable top-end performance.

Overview

This Wiseco Std Piston Kit for Yamaha Bolt 950 is a direct-fit top end replacement built for riders who want reliable compression and consistent engine performance. The 85.00mm bore and 10.5:1 compression ratio make this Wiseco piston kit a solid choice for rebuilding or refreshing the 950cc V-twin. It suits home mechanics and professional shops handling routine top-end service.

Built For Performance

• 85.00mm standard bore sizing for a direct fit on the Yamaha Bolt 950
• 10.5:1 compression ratio for strong and consistent combustion
• Forged piston construction for strength under load
• Wiseco part 40115M08500 for confirmed cross-reference
• Kit includes piston, rings, pin, and clips for a complete top-end rebuild

Fits These Machines

• for Yamaha Bolt 950, 2014-2021

On-The-Job Use

• Top-end rebuilds and piston replacement on the Yamaha Bolt 950
• Routine engine refresh when compression falls below spec
• Restoring performance after ring wear or cylinder scoring
• Shop-based rebuild jobs requiring a matched piston assembly

Specs At A Glance

Good To Know

Q: Is this a standard bore piston or an oversize? A: This is a standard bore Wiseco piston kit at 85.00mm, so it fits a stock bore cylinder without additional machining.

Q: Does the kit come with rings and pin? A: Yes, this Wiseco piston kit includes the piston, rings, wrist pin, and clips so the top end can be assembled in one go.

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