Wil this work with 18 hp motor?
This clutch assembly is suggested for an 8 hp motor, since we generally carry parts for smaller gas and electric recreational vehicles. That being said, the 1" bore allows this clutch to work with gas engines larger than 6.5 hp. You might consider double checking with your manufacturer if the 1" shaft and the 420 chain sprocket will work on your particular unit. Here is a link to the motor we have confirmed compatibility with:
https://www.monsterscooterparts.com/go-cart-parts/go-kart-brands/predator-go-kart-engine-parts/predator-301cc-8-hp-engine