fully ported cylinders done properly squish demintions for max power and cooling, machined head and case, 185lbs each side, yamaha race clutch heavy springs, TZ bearing on PTO side of crank, some billet stuff, boost ports, 2T2 rods, trued welded crank, carbon reed/spacers, ported expoyed cages, has 35mm gas carbs on 112 octane. seems to run quicker with smaller alky carbs. walks away from cheetah cubs so far. its 68mm bore 61mm stroke. +2 front gear, 8 inch arm, twist throttle, dual filters.