wel lads have a 96 kx250, just done a full rebuild, 2day was the first test run, was driving it half throttle for most of the day, at the end i was giving it a bit more, but i noticed dat when i hit the power band it spluttered a bit as if the revs were braking down, i messed around with the air/fuel screw, which made a bit of differences, opened bout half to 1 full turn, but was still missing a bit when hitting powerband, 1st 2nd are worst then as u get up threw gears not as bad, bike was grand before rebuild, what you,s thinks, timming, jetting, any suggesting?