Jeff Thomas of thomasracingservice.com just finished a really trick XR-650R hillclimber. It's in one of his own custom frames (based on CRF-450 geometry) running on methanol and nitrous. The nitrous system uses no pump--extra fuel is supplied by pressurizing the carb float bowl when the nitrous is turned on which forces more fuel through the jets (the bowl vents are plugged, obviously). All of the charging system including the left sidecover has been removed and a remote starter drive on the crankshaft installed so it can be started with a hand held automobile starter motor. It uses a Dyna Ignition which is driven off of the cam. If I can get some pictures of it I'll post 'em when I can. For those in the midwest supposedly the new owner will be coming here to ride it at the "East-West Hillclimb Shoot-Out" at Nashville (Ski World), Indiana on Sept. 18 so you can come and see it run!!