I purchased a MBRP can. It seems to run pretty decent until it gets warmed up and then it runs really doggy off the bottom. takes about a good hundred yards or more until it clears out and runs full RPMs. I have heard there is a lean spot on the bottom end on this machine. Maybe its not getting enough fuel on the bottom? not sure. Perhaps i will have to put a boondocker box or another on it to clear it up? Any input is greatly appreciated.