Complete chain drive kit featuring BDL's ball-bearing lockup clutch for riders who want a lighter, easier to operate clutch Provides approximately 60% more surface contact area than stock clutch for smooth, sure power transfer to the rear wheel Complete kit includes rear basket with BDL ball-bearing clutch, front 25-tooth sprocket, Diamond primary chain and adjuster assembly Made in the U.S.A.. PRIMARY DRIVE W/LOCKUP