Since I rebuilt my top end with a one over bore and wiseco pistons, cool head with 18cc domes, stock carbs with 300 jets, carbon-tech reeds, K&N filter, 4 degree advance stator, tors removed with twist throttle and toomey T5's, I have had a problem with the left cylinder not idleing on its own and the pipe not warming up(luke warm at best). The right cylinder is idleing but a bit high and the pipe warms normally. I have tried everything to slow the idle on the right side with no luck. Once the engine is revved, the left cylinder comes to life and the bike runs perfectly. At idle, the left pipe smokes and the right doesnt. I tried changing plugs and after a spark test have found that there is good spark. Any ideas?