Built my 2000 xr650l with 10.5 to 1 comp piston, hotcams stg 1 cam, cleaned up the ports matched them to the manifolds, WB headpipe and Eseries pipe with 16 discs and closed end cap. I went Supermoto with 17 inch rims and suspension mods. The prob Im having is with the carb, I built this bike with hopes that it would run like a XR600R, but it doesnt... I think that the carb needs jetting. It stumbles at a constant throttle below 1/4 turn, it pulls pretty hard up through 1/4 throttle to wide open, but not like a XR600r. Any ideas or tips would be greatly appreciated. Any questions, I would be glad to assist others.