SPI .040 Over Bore Piston Kit for Yamaha many Phazer & Venture 480 & 500 73mm

SPI .040 Over Bore Piston Kit for Yamaha

This SPI .040 over bore piston kit is a high-performance replacement piston for Yamaha Phazer and Venture 480 and 500 models, featuring a 73mm bore size to restore engine compression and power.

Overview

This SPI .040 over bore piston kit is designed for Yamaha snowmobile and utility engines, providing a precise 73mm bore diameter for rebuilding worn cylinders. The kit includes everything needed for a direct installation, making it a cost-effective solution for restoring performance in Phazer and Venture models. Durable construction ensures long-lasting service in demanding conditions.

Built For Performance

• .040 over bore size for increased displacement and compression
• Precision-machined 73mm piston for accurate fit
• High-strength aluminum alloy for heat resistance
• Includes piston rings, wrist pin, and circlips for a complete rebuild
• Designed for reliable operation in Yamaha 480 and 500cc engines

Fits These Machines

• for Yamaha Phazer 480
• for Yamaha Phazer 500
• for Yamaha Venture 480
• for Yamaha Venture 500

On-The-Job Use

• Replaces worn pistons in snowmobile engines for winter riding
• Restores engine power and reliability during rebuilds
• Used in utility vehicles and recreational riding applications

Specs At A Glance

Good To Know

Q: What is the compression ratio of this piston kit? A: The compression ratio depends on cylinder head design; this SPI piston matches OEM specifications for your Yamaha engine.

Q: Do I need to machine the cylinder for this overbore piston? A: Yes, the cylinder must be bored to 73mm to accommodate this .040 over piston; professional machining is recommended.

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