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clutch slipping on start up and cant run without choke

M

mastermechanic5

Guest
hey guys whats up, i just got my boygofast 70cc engine kit and i must say im lovein it, but i have 2 problems although the clutch doesnt slip when im riding it slips on start up for about 5 feet then grabs and the engine turns over and starts. I already tried adjusting the clutch nut and that didnt help much, i also tried cleaning the pads and disk with automotive brake cleaner and i think that actually made it worse:-| Also when i try to turn the choke of after the motors been running for a wile the engine bogs and runs like **** i richened up the fuel mixture screw and this helped but i was wondering if theres a air leak or some other problem. Sorry i made a new post but i did a search and didnt really find a solution to my problem.

Thanks guys,
Tom
 


M

mastermechanic5

Guest
I adjusted the clutch nut like 6 times now no matter what position its in the clutch still slips on start up, so as far as the choke problem you just think is a air leak on my manifold? I hope so thats easy to fix =) Another thing in my manual it says that that screw on the side of the carb is a mixture screw and i was messing with it and it had no effect on my idle maybe because my throttle cable is too tight holding open my throttle?

Thanks,
Tom
 
M

mastermechanic5

Guest
well it turns out that im just a noob and for some reason i thought that the choke in the down position was full choke when it was really choke off so thats no longer a problem, and i took off the clutch plate again and i cleaned it with brake cleaner again and sanded the clutch plate lightly to make it grab better and this made it much better but still slips a little on start up. http://www.motoredbikes.com/showthread.php?t=10481&highlight=clutch+adjustment
that link didnt seem to have anything on clutch adjustment it just seemed to be about installing chains? any other sugestions?

Thanks guys,
Tom
 
M

mastermechanic5

Guest
but when i tighten the nut any more the clutch lever gets a looser feeling and the clutch doesnt disengage as much, btw i can't put my clutch in the lock position in order to disengage it i must pull it in all the way, i cant loosen the nut cuz then it wont engage. It seems to me there is more going on then just the clutch nut adjustment any thoughts?

Thanks,
Tom
 

bikeshox

New Member
Joined
May 7, 2010
Messages
3
I have the same problem as Tom with the clutch slipping. Is there an upgraded clutch spring package that is available? I am assuming to put a heaver clutch spring in you need to split the cases?
 
M

mastermechanic5

Guest
It's been quite awhile since I've touched my bike but I think I solved that problem by sanding the friction material and the clutch plate to remove the glazing. If you do find a stronger cluctch spring I don't think you will need to crack the case to change it but I could be wrong.

Hope this helps
 

AussieSteve

Active Member
Joined
Oct 28, 2009
Messages
1,746
bikeshox - Yep, you need to split the cases to replace the spring. The original spring should be strong enough, though. Also, as far as I know a stronger one isn't available.
More likely there's grease or oil on the clutch pads.
 
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