So I have this used bike that I've been troubleshooting that I started a thread about a while ago here:
http://motorbicycling.com/showthread.php?t=38092
But the thread is 3 pages long and a bit hijacked so I'll start fresh here.
I think I've got it narrowed down to the clutch/bottom end. The reason that I say this is because I can get the motor to run and sound like a 2-stroke should at high RPMs. But this is only with the clutch disengaged (handle pulled). With the clutch engaged the bike sounds kinda like it does in the video when you hear me twisting the throttle towards the end of the video. It barely has any power, and sounds bogged down, almost like a 4 stroke. With the clutch disengaged I can get it revved up to that high 2-stroke whin-whin-whin. But the bike also does not want to idle with the clutch in (idle screw on the carb. also all the way in).
Another reason I think it is the clutch is that the previous owner really monkeyed with the cable to the point where the end was completely frayed and unusable so I took it off and have no cable/ clutch handle. What I've been doing to test the bike is push the clutch arm in (the clutch bar over the motor drive sprocket, (it stays pushed in, is that bad?)) and then flick it out to engage the clutch/start the motor.
I also noticed when I pulled off the clutch cover there was quite a bit of strong smelling dirty oil/grease (maybe gas mixture?) on the inside of the cover.
I tried spinning the flower nut out a bit, but so far that did not help, would doing that more help? Is there such a thing as too much clutch engagement that causes the motor to bog down?
Thanks for helping out a rookie!
http://motorbicycling.com/showthread.php?t=38092
But the thread is 3 pages long and a bit hijacked so I'll start fresh here.
I think I've got it narrowed down to the clutch/bottom end. The reason that I say this is because I can get the motor to run and sound like a 2-stroke should at high RPMs. But this is only with the clutch disengaged (handle pulled). With the clutch engaged the bike sounds kinda like it does in the video when you hear me twisting the throttle towards the end of the video. It barely has any power, and sounds bogged down, almost like a 4 stroke. With the clutch disengaged I can get it revved up to that high 2-stroke whin-whin-whin. But the bike also does not want to idle with the clutch in (idle screw on the carb. also all the way in).
Another reason I think it is the clutch is that the previous owner really monkeyed with the cable to the point where the end was completely frayed and unusable so I took it off and have no cable/ clutch handle. What I've been doing to test the bike is push the clutch arm in (the clutch bar over the motor drive sprocket, (it stays pushed in, is that bad?)) and then flick it out to engage the clutch/start the motor.
I also noticed when I pulled off the clutch cover there was quite a bit of strong smelling dirty oil/grease (maybe gas mixture?) on the inside of the cover.
I tried spinning the flower nut out a bit, but so far that did not help, would doing that more help? Is there such a thing as too much clutch engagement that causes the motor to bog down?
Thanks for helping out a rookie!
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