NARAKU CLUTCH BELL R-VENT 125MM NK900.74High Performance clutch bell with patented R Vent system for more fresh air over the clutch, Prevents wear and loss of friction, Lower operating temperature and great grip, No delay in the heavily loaded areas, Low weight means better acceleration, Great value for money in the high end sector, In combination with a 107mm clutch this clutch bell can also be used on scooters with the older 105mm clutch system