150CC Big Bore Cylinder Piston & Gaskets Kit For Yamaha TTR125 TTR125E TTR125E L

150CC Big Bore Cylinder Piston & Gaskets Kit for Yamaha

This 150CC big bore cylinder piston and gaskets kit rebuilds the top end of a Yamaha TTR125 with a larger bore for more displacement, and it installs with the included piston, rings, and gaskets so the job can be completed in one pass.

Overview

The 150CC big bore cylinder piston and gaskets kit is a top end rebuild set that raises engine displacement on a Yamaha TTR125, TTR125E, and TTR125E L. This big bore cylinder piston and gaskets kit restores lost compression while adding extra power, making it a practical choice for riders who want a stronger trail bike. The big bore cylinder piston and gaskets kit walks the rider through genuine top end work without hunting for each individual part.

Built For Performance

• Bore increased to 150CC displacement for a boost in low end and midrange pull
• Piston and rings matched to the larger cylinder bore for proper sealing
• Gasket set included so the top end seals correctly on reassembly
• Cylinder is machined for consistent wall thickness and roundness
• Kit supplies the parts needed to complete the rebuild in one order

Fits These Machines

• for Yamaha TTR125
• for Yamaha TTR125E
• for Yamaha TTR125E L

On-The-Job Use

• Trail riding where extra displacement helps carry momentum uphill
• Backyard track use where quicker acceleration off corners matters
• Top end rebuild jobs after low compression or a worn piston
• General engine freshening after long service hours

Specs At A Glance

Good To Know

Q: Does this kit require jetting changes after install? A: A bigger bore often needs carburetor rejetting to run cleanly. Check the plug after the first ride and adjust as needed.

Q: Can I install this kit without boring the cases? A: It is designed as a bolt on top end kit for the listed models. Verify clearance and follow the machinist or service manual specs before assembly.

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