cause of a 2 cycle 4 cycling

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mybike

New Member
Jan 19, 2011
37
0
0
bella vista ar
For some reason my 66cc 2 cycle bgf engine does a lot of 4 cycling. Can you give me some help with this. Just above 1/2 throttle with a little pull it's fine, but above and below it 4cycles. Full throttle it seems to be fine. occ stingray chopper with 44th sprocket and extended exhaust. Bottom end decent top end not great.

Thanks
mybike
 
GearNut

GearNut

Active Member
Aug 19, 2009
5,104
11
38
San Diego, Kaliforgnia
4 stroking it typically caused by a carb that is adjusted too rich, too much fuel to the fuel. air ratio.

The slide needle will adjust the ratio from 1/8 throttle to 3/4 throttle.
The fuel jet will adjust the ratio from 3/4 throttle to full throttle.
Do a search on this site. There are a ton of threads concerning this.
 
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