So me and my buddy in our spare time have been building me a stroker motor, everything new and aftermarket. Well we got it all together yesterday. It ran like shit, but neither of us know much about the 28mm PWKs that came with the shee when I bought it, we do know Mikuni carbs,,,,so we put the stock mikunis on with 280 jets since his stroker shee uses 280s, It had no balls whatsoever. We put 320s in there and that fucker was fast,,,,it would kill his stroker shee. So we took it to the local riding spot and I got about 30 yards then the fucker studdered and died. We've spent the past 7 hours fucking with it and doing everything we know and reeming the clymers manual and nothing has worked. We did put 290 jets in...decreased the timing to 6 degrees and moved the needles up one notch.....it fired but it wont even try to run. We checked the pistons..rings...crank....jugs....head...reeds...carbs...pipes for being clogged....all of the wiring looks good. It is now beyond our knowledge as to whats wrong so any suggestions you guys might have or know the problem please help me out, I would greatly appreciate it. Thanks!!