thanks 'Ol'89r........
but Sudco was of no help. According to their tech, they have never done ANY r &d on any Xr250. However, I did manage to find a baseline setting for my modified XR250(284).If anyone is interested in the baseline jetting for a Mikuni TM34 on an XR250 with 284 kit, hotcam, freemods,FMF Q pipe, and some porting, they are as follows as per Al Baker's XR's only:
Main Jet = 195
Pilot = 40
jet needle = 6DH3
needle jet = 02
I have not confirmed this setup yet( I havent even ordered the parts), but I will post final settings upon completion of final modifications and tuning........
If anyone cares..............................................................
Bullet Bob