Broke a keyway

chuck216

Member
Joined
Mar 1, 2008
Messages
30
For a while now I've had a problem with the chain coming off. Well this time it did it and caused the chain to wrap around itself on the front (engine) sprocket. The result.. a sheared keyway on one of the gears inside the gearbox. I have the huangsheng 4 stroke with one of the "figure 8" type gear boxes. does anyone know where I can get a replacement keyway?

Also any suggestions of what may be causing my chain to come off in the first place, I've tried it tight, loose and all points in between.
 


H

HoughMade

Guest
Key, or keyway?

A key can be found at any well stocked hardware store- Ace is a favorite of mine.
 
P

Proboscis

Guest
Up north here you can find woodruff keys at Canadian Tire.
 

Marktur

Member
Joined
Apr 30, 2008
Messages
471
I would check the alignment of the gears. If you hear any type of clicks or funny sounds from the chain while rolling with the clutch disengaged, 99% of the time it's from an alignment problem. A wobbly gear at higher speeds will eventually throw the chain.

Hope that helps :)
 

chuck216

Member
Joined
Mar 1, 2008
Messages
30
I would check the alignment of the gears. If you hear any type of clicks or funny sounds from the chain while rolling with the clutch disengaged, 99% of the time it's from an alignment problem. A wobbly gear at higher speeds will eventually throw the chain.

Hope that helps :)
Yep, the alignment was slightly off, well not the chain itself but the idler wheel. I added a spacer and that fixed everything.
 
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