helping getting my 49cc china to run

nadroj · #1 (**permalink**) 10-07-2008, 03:34 PM

Hi,
Ihave no idea how to get this thing running right. It has white smoke coming out of the exhaust and it wont idle at all, I gave it give it a lot of gas to keep it going

**Bikeguy Joe** · #2 (**permalink**) 10-07-2008, 03:36 PM

Is your carb needle clip set at the second notch from the top?
Also, use the screw on the side of the carb to raise the idle speed, it's not a mixture screw despite what the directions may state.

deacon · #3 (**permalink**) 10-07-2008, 04:24 PM

also check to see if the throttle cable is adjusted correctly.

Biker Mike · #4 (**permalink**) 10-07-2008, 05:46 PM

check the color of the spark plug. If it is oily black you have too much oil in the mix. Sounds like you do being as you say you have white smoke. You should have some but not excessive.

nadroj · #5 (**permalink**) 10-07-2008, 06:41 PM

I just adjusted the idle valve. but it is running good but it feels like its lacking power. small hills i have to pedal on... it has a 44t, i thought this thing would be a rocket. how do you adjust the needle clip ?

jerseykat1 · #6 (**permalink**) 10-07-2008, 07:01 PM

sounds like your running lean. silicon your carb onto the manifold, and make sure that you have the throttle cable cap that screws on the top of your carb tightened down completely (i am not talking about the cable adjuster but the part the adjuster screws into). make sure your plug gap is reasonable as well.

nadroj · #7 (**permalink**) 10-07-2008, 07:14 PM

silicon sealant? get it from autozone? Ill check the throttle cable cap. what should the gap be ?

jerseykat1 · #8 (**permalink**) 10-07-2008, 07:49 PM

.020-.025" seems to work best. autozone yes. black RTV silicon sealant, yes. also make sure your spark plug isnt broken inside electrobe broken. pull it out and shake it in a quiet room if you hear a noise or feel movement other than the metal washer that's on it. throw it away and get a new one. search the forums for a spark plug part number.

search the forums for carb installation it shows you how to seal it properly.

Dan · #9 (**permalink**) 10-07-2008, 10:19 PM

White exhaust is normal at first (Not a lot!) and adjusting length of throttle cable by adjusting ends will be the easiest idle fix. wait to fine tune. Small changes at first are easiest to fix. Just my opinion.

nadroj · #10 (**permalink**) 10-07-2008, 10:48 PM

should i try to mess with the needle clip? its running decent now, just leaking alot, i still haven't sealed the carb, didnt have time to go to the auto store. It just feels like it doesnt have much power.