hi there i have a 96 husky wr360, had a full rebuild. crank, rod, piston, every bearing in the engine replaced with new. new reeds cleaned the carby, replaced the spark plug, coil and lead. ok so here is the problem start in fine no problem. warm it up for about 5-10 mins, runs fine power band come on beautiful. after riding it around for about 15-20 mins the problem start to happen power band dosent come on, bottom end runs good but soon as it should come into band, nothing happens.. makes a big brrrr noise and donts want to move just satys at the same speed.. when this happens blows more smoke then normal.. if anyone could help me out would be much appreciated.. Cheers