BikeMaster Clutch/Flywheel/Primary Tool - 150619 0 For 50cc mini MX racers, the BikeMaster® Clutch and Primary Tool can help with disassembly. This seven-hole disc with 6mm bolts can be used to remove clutch bodies, flywheels and primary gears. $24.49 $24.95 Quick view add to cart Add Wish List