Straight cut gear kit recommended for power outputs up to 250bhp or revs over 7500rpm. Differs from the Clubman kit by using needle roller bearings between the new Quaife mainshaft and its gears. Kit also includes an alloy top cover to strengthen the gear case. Designed only to fit in the HD RS1800 gear case as std. Rocket gear casings will require additional modifications or you can purchase an alloy maincase that has already been machined with the modifications. Available options - alloy maincase, gearlever, steel baulk rings and HD operating block - POA. Gearboxes can also be supplied with a short tailcase, moving the gear lever forward approx 10" - POA.