Italian motorcycle parts and accessories specialist Athena has introduced a new big bore cylinder kit for the Yamaha YZ450F. Designed for riders looking to take their dirt bike to the next level, the kit is a bolt-on application that claims to improve engine efficiency, performance, and response. Compatible with all Yamaha YZ450F models from 2020 to 2022, Athena’s bore kits are designed and manufactured in Italy.
According to Athena, the Big Bore Kit can be installed without making any modifications to the crankcase. The kit consists of a lightweight forged piston, aluminum cylinder head with a self-lubricating and anti-seizing coating