sh engines have always been reliable,straight forward to tune,and responded predictably to pipe changes.with the 13 mm crankshaft,looks like it may share more features with the mach .26,.427 and others. the v2's had a 14 mm crank.looks to be a good basic mill.when people would ask,i would suggest the .427 for a cheap truggy motor,but didnt have a real good answer for buggy,but i think this is it...about time!!!!!!