Hi Im new to the site , I have a 2004 Honde 400ex it starts and runs strong down the road but when idleing it acts like it is misfireing or un burned gas is building up and the fireing.
I have taken the carb apart clean all ports new dyno jet, jet kit with a 170 and no air box lid just like the instructions clean k&n with outerwears new spark plug , fresh 100 octane fuel. Any and all sugestions would be appreciated.