Post by johnny3d on Aug 9, 2013 14:48:51 GMT -5
I've just recently moved up into the mountains of South Dakota (about 15 minutes from Sturgis). I've noticed that my Jonway YY250t is idling really rough and that the idle adjustment doesn't seem to be functioning properly.
If I turn it down low, it drops the idle down below were it should be (about 1000rpm). If I turn the idle adjustment up, it'll get up to about 1200rpm and instead of continuing to go up it'll start making a 'pop-pop-pop' kind of sound and will jerk a bit. If I crank the idle adjustment screw up all the way it'll idle smoother but too high...
I think the problem is that I need to adjust my air/fuel mixture screw, but I'm not 100% sure where it is on my carb. I think I've found it (down out of reach facing down on the back of the air/fuel output side), but if that is it, I can't figure out how to reach it to adjust it while it's running.
I made a video so you can hear it somewhat. Hopefully it helps. If there is something else or another video you would need to help me figure this out, please let me know.
Here is the video:
If I turn it down low, it drops the idle down below were it should be (about 1000rpm). If I turn the idle adjustment up, it'll get up to about 1200rpm and instead of continuing to go up it'll start making a 'pop-pop-pop' kind of sound and will jerk a bit. If I crank the idle adjustment screw up all the way it'll idle smoother but too high...
I think the problem is that I need to adjust my air/fuel mixture screw, but I'm not 100% sure where it is on my carb. I think I've found it (down out of reach facing down on the back of the air/fuel output side), but if that is it, I can't figure out how to reach it to adjust it while it's running.
I made a video so you can hear it somewhat. Hopefully it helps. If there is something else or another video you would need to help me figure this out, please let me know.
Here is the video: