Thanks for the replies. I'm probably gonna help him with some of the wrenching on this bike. I'm sure that the Sand Stars he has will be forgiving in the sand. But for a typical zilla, it is alot quicker than his TRX-250 (stock with an FMF & open element air filter). I know we are all searching for ways to go faster & quicker so no one ever tries to slow a 500 down. The reason I was asking is because how many of us have a friend that is new to performance quads & get a good deal on a zilla before they are ready for one? Or some of us that have a significant other that wants or has a 500 but don't need it to go racing with the guys.