I ride for 1-1/2 hours runs amazing. Stop for 10 minutes. Start riding again. Bike begins to bog. Have to give it gas to over come. Back fires and pops like crazy. Gets so bad. Once u stop at a light. Bike will idle. But will backfire and pop. When u go to take off. Bike will stall or u need to give it a tonne of fuel to go. Popping and backfiring worse.
-black soot (carbon) all over rear plug. Front clean plug clean.
-black soot all over rear cylinder exhaust tip. Front is okay exhaust tip clean.
-air filter clean
-carb torn apart and cleaned
-new high test fuel