how to adjust

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xzackx

New Member
i just got my engine running in my bike yesterday (i didnt know how hard the clutch was to pull so i started it with the clutch out) but as i was running it i noticed a black gunk around the bottom of my exhaust pipe its pointed straight down but i dont think thats what causes it and if anyone knows what is about the best air/fuel mixture ? how many turns ? thanks
 
There is no mixture adjustment screw.
You can move the circlip position on the needle to change the mixture though. lower is leaner and up is richer.

The one screw on the carb is for adjusting the idle rpm.
It's a 2-stroke motor, the back oily residue is caused from the unburnt oil/fuel mixture.
That is exacerbated if you mix in too much fuel. Try 24:1 for the first gallon, then got to 36:1-42:1 after it's broken in.
 
Nidyanazo is right about that. I mixed my fuel 16:1 as per instruction, it drips and smokes like crazy. Don't use that much oil.
 
nidyanazo said:
There is no mixture adjustment screw.
You can move the circlip position on the needle to change the mixture though. lower is leaner and up is richer. QUOTE]


You have it backwards...moving the clip upwards leans the mix; downwards richens it. Think of it this way. The higher the clip the less travel upwards so less needle taper is exposed, therefore less fuel. The lower the clip position the higher the needle is raised, more fuel can enter so you get a richer mix.
Tom
Click to expand...
 
ok thank you guys for helping out and yeah i used the 16:1 i'll have to try the 24:1 next tank of gas
 
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