I have a predator 212 with 3.308 ARC rod, ARC flywheel, stock dish piston, RTC-6 (stock 27/25mm valve) milled 0.050 off, 1.3 rockers with stock cam, 8 degree key and mikuni 22mm carb. My bike is a Manco with Maxitorque 10T clutch, 43T rear (4.30 gear ratio), stock 16" tires with paddel brake...