I once fucked up a quick throttle home-made jobbie.... and it was an experience I'll never forget! The throttle moved just fine in the shed, but on the first lap around, over the hill out of T5 and it got stuck WOT. Massive wheelie, massive stoppie, all while the bike is revving its nuts off at 16k rpm, and ended up running straight on into the deep gravel trap on the left of turn 6 (no longer there). The bike stayed upright, but the front wheel was buried below the axle, and it took 3 guys to drag the bike out. Scared the living shit out of me, and made me ultra careful about throttle mods! The throttle was so stuck it needed to be disassembled to release it. Be careful, is all I can say.