just to let ya all know mike never ran the 56er,,, was illegal..... he set all records with his bounce pipe motor and overdrive.( orig 3" bore motor,),.. except the short course stuff..... wow tim you turn that high rpm??..me below that,,, but am running well over 8"dia,,,,, up here we all just brake the wiseco piston skirts..... we testing this weekend,,, d-stock and my kawi-rude,,, had to put new pistons in it forgot to turn water pump on last time,,,ugggg... that and richen carbs.... tim ..did you have to richen carbs up much with your trick front cases????... me working on bounce pipes now for rude,,, sure are big and heavy even my wrap around style uggg,,,,,