Stock exhaust mod

C

clay830

Member
I removed only the end cap of the muffler on my 80/66cc bike kit. Will that do any harm to my engine because of back pressure and all? Or could I just leave it? I still have the baffler (all the other stuff) in though.

what mods could I do to the stock exhaust that are ok for the engine?
I have the exhaust that has a weld on baffle so unscrewing it isn't an option.
 
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Also my bike won't idle and moves slowly without throttle but if I hit the brakes on the bike and manage to get the bike to a complete or almost complete stop the engine dies? Need Help
 
I think I have the clip set to what it comes on. Im not sure. Why? what should I have it at?
 
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clay830 said:
I think I have the clip set to what it comes on. Im not sure. Why? what should I have it at?
Click to expand...

The stock carb almost always runs too rich. Try moving the clip up a notch, and continuing to move it up one notch at a time and see where it runs best at. In my experience they usually run best at the leanest setting, but will usually still be running rich without a smaller main jet. They sometimes won't even start because they are so rich that they flood instantly.
 
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