Thanks for the reply I fired it up tonight and ran it for a bit. This engine ran at an idle and I havent even tuned the carb I ran the rpm up and down a few times and it is running great. I know I will need to lean the top end a bit cause full throttle it loads up a bit. I have a 20x8 and nexed time I run it I will take a rpm test. About vibration it shakes a bit a little above idle and a little on idle, but im not sure if I should stress that? I put a picture of it on here so you can see what we have running. So you think this motor will pull my 1/4 scale?