I am stuck up with a problem which I believed changing Carburetor will help but it hasnt. Whenever I start my engine, the engine rev goes 3000 rpm and it takes 5 - 10 seconds to return to 1000 rpm.. While riding, it creates a problem as I release my acceleration, it takes 5 - 10 seconds to reduce the speed. I tried adjusting the pin for throttle ( that comes with the carburetor ). When I reduce it, the bike engine goes off withing 5 seconds in Neutral if I am not accelerating. Increasing the pin causes the above said increased rev problem. :( the bike also stammers a lot between 2 - 4 gears and runs without problem only if I keep accelerating. Please Advise.
As mentioned before check throttle cable, check where it connects to throttle tube and carb housing to ensure it not hung up. Ensure the throttle promptly and completely returns when you release it and cable is not gummed up. Consider replacing the cable if it is worn or old. Remove and replace throttle tube. Test return when throttle is not connected to tube housing. Remove gas tank and test carburetor return spring when cable is exposed to ensure a constraint or pinch is not obstructing return.
If throttle return is not hanging then look for obstruction in fuel supply line and air intake (I once found a mouse nest in the air filter of a dirt bike after winter storage)
Have tried lubricating the throttle cable and twist grip mecanism , is the cable routed correctly and no kinks in it ? where the carb fits to the engine check the rubber mount has no cracks or holes as it will draw more air than needed !
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