SPI Stock Bore Piston Kit for Yamaha 1973 GP338 1974 SL338 1976-1977 GS340 60mm

Stock Bore Piston Kit for Yamaha

This SPI Stock Bore Piston Kit for Yamaha is a 60mm replacement piston assembly, serving as an OEM cross-reference for 1973 GP338, 1974 SL338, and 1976-1977 GS340 snowmobile engines.

Overview

This SPI stock bore piston kit is a precision-engineered replacement for Yamaha snowmobile engines. It provides the necessary components to restore compression and performance in your Yamaha two-stroke engine. Ideal for enthusiasts rebuilding their GP338, SL338, or GS340 models, this piston kit ensures a proper fit and reliable operation.

Built For Performance

• Precision cast piston for consistent expansion and durability
• Matched ring set for optimal sealing and compression
• Lightweight design reduces reciprocating mass for quicker throttle response
• High-strength wrist pin with included circlips for secure installation
• Stock bore dimensions ensure direct replacement without machining

Fits These Machines

• for Yamaha GP338 (1973)
• for Yamaha SL338 (1974)
• for Yamaha GS340 (1976-1977)

On-The-Job Use

• Rebuilding classic Yamaha snowmobile engines for restoration projects
• Replacing worn pistons to restore lost power and compression
• Performance upgrade for vintage snowmobile enthusiasts
• Maintenance rebuild during engine overhaul

Specs At A Glance

Good To Know

Q: Is this piston kit complete with all necessary components? A: Yes, the kit includes the piston, piston rings, wrist pin, and circlips for a complete top-end rebuild.

Q: Will this piston work in other Yamaha snowmobile models? A: It is specifically designed for the listed models; always verify your engine’s serial number and bore size before ordering.

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