Thanks Q2W. I got a lot of money tied up in this motor or I would swap in a 500. I even have a new rare Hinson clutch basket. I might do a YFZ450R hybrid 500 next winter. Do you have Jerry's number? Are his pipes overly huge like all of the other custom pipes I have seen? If so I'll stick with my FMF. Not a fan of the drag pipe look on a motocross bike👍🏻