When accelerating it spits, sputters, and acts like it is starving for fuel. Idles fine. No smoke at all. Plug carbon is normal…..meaning its not black (rich) or white (lean). Once you get up to speed and try to maintain it, it still spits and sputters. I can take the throttle and work it (meaning let off and give it gas again over and over) and it will somewhat run normal for a few seconds, but its right back to spit and sputter.
What I’ve done:
When I got this wheeler it had no carb on it. did my research and bought one. Installed it along with a new throttle cable and new choke cable. It had been sitting for about 2 years with just a cup over the intake. Installed a fuel filter inline and cleaned the tank good. replaced fuel pidcock valve.
Adjusted the valves per Yamaha specs. I’ve run several cans of fuel cleaner through it. noticed that the rubber was harder than normal on the intake, so i tested the "leaking intake" theory by putting silicone around the carb to seal it up. No difference. I’ve read several forums on correct carb adjustment and did the procedure to mine. After adjusting it per other forums still no change.
If anyone has any help on this it would be very greatly appriciated. This wheeler belonged to my best friend’s dad. He willed it to me after his death and its important to me to get it running right. Again thanks in advance for the help!
