The previous owner (who is in jail for streetracing and felony evasion of police) raced it some and I am told did some mods on the engine. Not being a motorcycle mechanic I can't say for sure whether it's true or not, but I do know that it's FAST. I'm going to take some more pics after I get it back from the mechanic for some before & after shots. I'll be adding some new plastic real soon.