Athena 1997-2004 Yamaha YZ 125 LC Factory 144cc 58mm Big Bore Cylinder Gasket Kit

Add serious displacement with this Athena big bore cylinder kit. The 58mm bore increases your engine size to 144cc. More cubic centimeters means more torque and power across the rev range. Feel the difference a bigger cylinder makes.

Athena casts this cylinder from high strength aluminum alloy for durability. The Nikasil bore coating provides excellent ring seal and wear resistance. Ports are designed for optimal flow at the increased displacement. Quality construction handles the stress of more power.

This big bore kit includes the cylinder, matching piston, rings, and all necessary gaskets. Everything is engineered to work together for maximum performance. The kit drops in with no case boring required on most applications. One package gives you everything needed for the upgrade.

This cylinder kit fits the 1997-2004 Yamaha YZ 125 LC. Big bore kits increase displacement beyond stock specifications. Verify clearances and compatibility with your other engine components. Some applications may benefit from additional modifications.

Athena big bore kits deliver proven power gains for serious riders. Get more displacement and more performance from your engine. Built to perform when you demand the most.