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So ever since i switched to a 83cc bbk i've had this condition when i am barely maintaining speed, sometimes when i give it gas from a dead stop, and sometimes when im full throttle. it cuts out like someone is hitting the kill switch then comes back on like normal, when it does this it sounds almost like a hollow sound coming out of the intake...I think that is the sound of a lean misfire.

i had an 38 idle and a 92 main it it and the plug was as nice whiteish with a hint of brown but no matter what i did to the idle mixture screw it wouldnt fix the problem. I have since switched to the 40 idle and 92 main but then i have no idle speed change when i adjust the mixture screw and when i rev it it blows out blue smoke.

then i changed the idle to a 33 out of frustration and still no idle speed adjustment and blue smoke.
then i changed it back to a 38 idle...so back to what it was originally and still no idle speed change and blue smoke when i give it gas.
Im really peeved by this and am about to throw in the towel and say screw it.
something is obviously wrong but i have no idea what it is.

when it was a 38 idle and 92 main i was only getting about 50mpg, this isnt right, right? even with the 83cc kit and stock head and cam?

also it clockwise on the mixture screw leaner and counterclockwise richer?

I'm havin this same problem after I installed my 83bbk. I've tried up jetting to 98-made it worse, plug was black. Down jetted to 92 better but still there, plugs perfect color.
Someone told me that I should move the clip on the needle. And see what happens.
Don't think it's pinging cuz u can clearly hear that, it's just like its to lean or just ran out of fuel and then got some. It's a steady rythm so to speak.


Somewhat of a hollow sound comes out of the exhaust when the power cuts out

I'm using the stock head. Did the bbk mainly for the torque aspect

Ok I got it installed and running. I went to turn it over at first and thought I had too high if compression because the electric start would engage the Bendix but not turn the engine unless I kick started it at te same time. Stupid thing was that my battery was fine two days before and apparently it was bad now. So I modified the battery lid to except the next size larger battery pumping out 120cca instead of the original 90cca...

So it turned on instantly and I let it idle for 20 minutes and goosed it two or three times to see if it would rev and it's seeming to do fine, it is smoking on and off some, definitely an oil smoke not a rich fuel smoke. This is normal right? As the rings seat? From what I've read about cars that's normal, and the mount of smoke varies, some times it's no smoke, other times it fain and other times its like a worn out two stroke. I've only ha it running for that 20min just idling on the stand at about 3300rpms. Shut it off to let it get cold again and I'll turn it on tomorrow and maybe take it around the block. I could tell just from revving it that it revs 110% faster! So that's good lol

These have a double bevel on the top ring and flat on the second ring

Ok, do u know if there is a top side and a bottom side?

Ok thanks guys! Always appreciate the quick no bs answers of this forum!
As opposed to some other forums... Uh hum (celicasupra.com) lol