O/ peoples my name is Neinth,Been searching these forums for a fix to this issue for a while now,great info here btw,has helped very much in some other issues I have been having.
But on to the problem,as title says when engine is cold the clutch engages and disengages fine,near perfect I'd say.When clutch lever is locked back tire rolls with ease,upon cold start droping clutch fires motor up great.
Problem is after the engine has ran for a bit and warmed up,and you shut it down,then try and pedal to start its very very tough,and you can hear the engine turning.I've adjusted the clutch wire so that the clutch lever works without coming anywhere near having to push it down all the way to disengage it when its cold thinking maybe that would fix it,but still once its warm even pushing lever all the way to handlebars the engine still turns.
I can not stress enough that this only happens when the engine is warm,everything seems to work perfect when engine is cold.
On a side note,with clutch disengaged the engine revs up full rpm's with no issue,under load it bogs down,may or may not be connected,but one thing at a time.And theres a bit of clutch squelling like its sliping,but since problem is disengageing I'm not sure what to make of that.
Engine is a 66cc grubee skyhawk gt5,has ran great before,only has about 50 miles so far,but keep running into issues.
Since i know its possible to fix things till their broke heres a list of the issues I have had,and have fixed so far:
1st the chain broke,horribly,multiple times,always on the master link,fix was to replace chain and use a chainbreaker to properly link the chain,more work yes,but also more reliable.
2nd followed recommended oil/gas mixture,terrible time starting,fix was to thin out gas mixture a bit
3rd trash in carb,along with dripping gas,fix was to take apart carb and clean,and adjust float bowl,also I raised the c-clip to second from top
4th throwing chain ALOT,couldnt run for more than a few minutes without throwing it,fix was to redo back sprokect,and spend alot of time truing it up correctly,very important step there i completly overlooked,also while do that I noticed engine was titled on frame,if i can get everything going right I'ma use some locktight on those frame bolts.But aligned engine and tightened bolts.
I suppose I should mention that in persuit of fixing this issue I have re-adjusted the clutch cable many a time,and adjusted the clutch flower nut a few as well.As I stated earlier I have got the clutch operation basically perfected when the engine is cold,plenty of free play in the cable with lever out,clutch disenages at maybe 3/4 pressure on the lever.When first start up,I can lock the lever and bike stays still,after about a minute though you can feel it wanting to go if you allow it,after about five minutes,shut it down and try to start it up your then fighting the engine while your pedaling.
Now just to fix this clutch issue and the engine bogging under load,which I think are connected somehow.So here's what I am thinking,if I take the clutch lever plate off,re-grease the pin and ball in there,possibliy the spring on other side of the clutch plate itself needs replacing?
I'm fully comfortable with any repairs with the exception of ones requireing machining or welding,as I just don't have the tools required for those.I love the engine,and I have riden it from where I live to the city,ten miles there and back,and it has rode great.Very dedicated to getting this engine up and going correctly and any advice on how to fix this,and how to aviod any future issues are appreciated.
Sorry for the long post but tried to put as much info in here as possible,with any luck I can get this resolved,but I am at my wits end to how to fix it,or even the exact cause,and you cant fix something if you dont know why its doing it.Maybe this is normal operating,I'll feel like a fool if it is,but then I still have the issue of the engine bogging down under load.
When I say bogging down I dont mean engine shuts off,it idles great and revs fine with clutch lever down,but when riding and I go to give it gas the sound changes completly,and the engine does not rev up.
But on to the problem,as title says when engine is cold the clutch engages and disengages fine,near perfect I'd say.When clutch lever is locked back tire rolls with ease,upon cold start droping clutch fires motor up great.
Problem is after the engine has ran for a bit and warmed up,and you shut it down,then try and pedal to start its very very tough,and you can hear the engine turning.I've adjusted the clutch wire so that the clutch lever works without coming anywhere near having to push it down all the way to disengage it when its cold thinking maybe that would fix it,but still once its warm even pushing lever all the way to handlebars the engine still turns.
I can not stress enough that this only happens when the engine is warm,everything seems to work perfect when engine is cold.
On a side note,with clutch disengaged the engine revs up full rpm's with no issue,under load it bogs down,may or may not be connected,but one thing at a time.And theres a bit of clutch squelling like its sliping,but since problem is disengageing I'm not sure what to make of that.
Engine is a 66cc grubee skyhawk gt5,has ran great before,only has about 50 miles so far,but keep running into issues.
Since i know its possible to fix things till their broke heres a list of the issues I have had,and have fixed so far:
1st the chain broke,horribly,multiple times,always on the master link,fix was to replace chain and use a chainbreaker to properly link the chain,more work yes,but also more reliable.
2nd followed recommended oil/gas mixture,terrible time starting,fix was to thin out gas mixture a bit
3rd trash in carb,along with dripping gas,fix was to take apart carb and clean,and adjust float bowl,also I raised the c-clip to second from top
4th throwing chain ALOT,couldnt run for more than a few minutes without throwing it,fix was to redo back sprokect,and spend alot of time truing it up correctly,very important step there i completly overlooked,also while do that I noticed engine was titled on frame,if i can get everything going right I'ma use some locktight on those frame bolts.But aligned engine and tightened bolts.
I suppose I should mention that in persuit of fixing this issue I have re-adjusted the clutch cable many a time,and adjusted the clutch flower nut a few as well.As I stated earlier I have got the clutch operation basically perfected when the engine is cold,plenty of free play in the cable with lever out,clutch disenages at maybe 3/4 pressure on the lever.When first start up,I can lock the lever and bike stays still,after about a minute though you can feel it wanting to go if you allow it,after about five minutes,shut it down and try to start it up your then fighting the engine while your pedaling.
Now just to fix this clutch issue and the engine bogging under load,which I think are connected somehow.So here's what I am thinking,if I take the clutch lever plate off,re-grease the pin and ball in there,possibliy the spring on other side of the clutch plate itself needs replacing?
I'm fully comfortable with any repairs with the exception of ones requireing machining or welding,as I just don't have the tools required for those.I love the engine,and I have riden it from where I live to the city,ten miles there and back,and it has rode great.Very dedicated to getting this engine up and going correctly and any advice on how to fix this,and how to aviod any future issues are appreciated.
Sorry for the long post but tried to put as much info in here as possible,with any luck I can get this resolved,but I am at my wits end to how to fix it,or even the exact cause,and you cant fix something if you dont know why its doing it.Maybe this is normal operating,I'll feel like a fool if it is,but then I still have the issue of the engine bogging down under load.
When I say bogging down I dont mean engine shuts off,it idles great and revs fine with clutch lever down,but when riding and I go to give it gas the sound changes completly,and the engine does not rev up.
Keep an eye on your plug colour to tell you if you're running rich or lean. You want a nice chocolate colour ideally. Remember, never remove a plug from a hot head, eh.
