Top End Kit For Yamaha YFM80 Moto 4 Raptor Grizzly Badger 80 Cylinder Piston

Top End Kit for Yamaha YFM80

This top end kit is a complete cylinder and piston rebuild set for Yamaha YFM80 Moto 4, Raptor, Grizzly, and Badger 80 models, restoring compression and top-end power.

Overview

This top end kit gives Yamaha 80 riders a full cylinder and piston rebuild package for worn or low-compression engines. It includes the cylinder, piston, and supporting components needed to refresh the top end on Moto 4, Raptor, Grizzly, and Badger 80 machines. For anyone servicing a tired YFM80 engine, this top end kit for Yamaha YFM80 brings compression and reliability back to spec.

Built For Performance

• Complete kit bundles cylinder, piston, and rings for a one-stop rebuild
• Piston sized to match the 80cc bore for proper compression
• Cylinder casting designed for the YFM80 engine layout
• Components machined for a consistent piston-to-wall clearance
• Gasket and hardware set supports a clean top-end reassembly

Fits These Machines

• for Yamaha YFM80 Moto 4
• for Yamaha Raptor 80
• for Yamaha Grizzly 80
• for Yamaha Badger 80

On-The-Job Use

• Rebuilding a YFM80 engine after low compression or oil burning
• Restoring top-end power on a worn trail or farm quad
• Routine engine refresh during a full service
• Bringing a used Raptor, Grizzly, or Badger 80 back into service

Specs At A Glance

Good To Know

Q: Do I need to rejet or adjust anything after installing this kit? A: A fresh top end restores stock compression, so if the engine was running lean due to wear, check jetting after the rebuild.

Q: Is this kit a direct bolt-on for my Yamaha 80? A: It is built for YFM80 Moto 4, Raptor, Grizzly, and Badger 80 models, but confirm your exact model year and bore 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.