My 426 ran great for 2 years but now after riding bike for a while if I come to a stop, I get a soft "pop" and bike stops running. Won't kick over...have to compression start it. Clean the carb and the above scenario starts over again. Any suggestion other than E-start? Bike used to relite with a light kick-no hot start. TIA, Bryce 01 wr426 obeln, 168 main, 48 pilot, 100maj, BK mod, lid off, YZ timing, grey wire.