[sheumadb]

Is this screw the A/F or idle?
http://i1229.photobucket.com/albums/...b/DSCN1001.jpg

Which ever that is wheres the other?? I can only find one screw on the whole carb....

http://i1229.photobucket.com/albums/...b/DSCN1000.jpg

 

[drgnprelude]

Is that the stock carb on a newer bike if so there is none just idle

 

[sheumadb]

So that one screw is the idle adjustment? Yes that is the carb that came with my Lifan 125cc.

 

[drgnprelude]

Yes all the new carbs are so called tamper proof that are imported on a motor to the us the due to emissions regulations are there screws on the bowl or tamper proof buttons?

 

[sheumadb]

On the float bowl i have screws.

Heres the screws on the bowl, there is one more that looks different than these on it but its still a screw. Why ? Whats it mean that there are screws instead of "tamper buttons"?
http://i1229.photobucket.com/albums/ee465/sheumadb/DSCN1020.jpg

Here are some tamper proof looking stuff on the carb, is this what you are talking about?
http://i1229.photobucket.com/albums/ee465/sheumadb/DSCN1021-1.jpg
http://i1229.photobucket.com/albums/ee465/sheumadb/DSCN1022-1.jpg

Heres the vent nipple that broke off, is that a big deal????
http://i1229.photobucket.com/albums/ee465/sheumadb/DSCN1016.jpg

 

[BlitzMInc]

yours doesnt have the lockout screws that he was talking about
but it doesnt appear to have much in the way of adjustments
when i had my 125 i ran a 26mm taporbore mikuni which is really a 22 with good velocity
http://tboltusa.com/store/mikuni-22mm-carb-p-375.html

 

[drgnprelude]

I was just gonna suggest a 26 lol ya blitz Is correct I wouldn't waste my time with that carb you'll never get what you could with a carb with the adjustments.
Plus with the 26 you know exactly what u have and you can easily get jets for it

 

[EPR]

Can you change the pilot and main jets to bigger??, that will help some.

 

[sheumadb]

IM not sure yet if i can change the jets, but i dont see why i wouldnt be able too. I will most likely just get a new carb for it once its running.

 

[BlitzMInc]

you can change the jets but the stock carb is a 19mm, the intake valve in the 110cc is 23mm, so you could increase the gas volume into the head but not the air flow, that is a good part of the reason the 22mm carb is preferred with the stock head over the 19, cuz more mix=more power

 

[sheumadb]

Mine is a 125cc lifan. Carb measures 25.5mm at the opening where the air filter mounts. Is that where the measurement is taken?

 

[drgnprelude]

No from the intake port on the cylinder head itself remove the intake manifold and measure the head port

 

[sheumadb]

Ok the head port is 26.13mm ID the carb on the intake manifold is 25.34mm ID and on the other side its the same 25.34mm ID. Do you guys think the vent nipple being broken off will be an issue?

 

[drgnprelude]

No I I don't think the nipple will cause any probs but you can go with the 26 Mikuni to make life easier lol

 

[sheumadb]

I will do once everything is ready to go and i get the extra money.

 

[drgnprelude]

I hear that

 

[BlitzMInc]

sheu, it sounds like your measurements are good, porting is just a fancy term for making all the holes and paths the same size with no airflow obstructions
your 125 might have a big valve head on it, those came with a 27mm intake valve, i had one with a 26 taperbore that ran good but when i went high compression i also had to get the vm26 to get the max gain

 

[Dipmage]

On my FS509 its the screw with the spring in it.

 

[EPR]

If your carb has a bulb on the bottom, its a 15mm copy Walbro WYK pumper carb. The screw w/ spring on the side is your high speed jet, out rich, in lean. The low jet is on top the carb, a brass slotted screw, if you turn it have to epoxy the thread so it don't turn. The idle screw is on top a little philips screw, the piston has a hole and turns, that screw opens the piston raising the idle or Vise Versa.
Turn the H S jet in all the way, not tight, count the turns, should be around 2 to 2 1/2 turns.

 

[ASTALKER123]

Is this screw the A/F or idle?
http://i1229.photobucket.com/albums/...b/DSCN1001.jpg

Which ever that is wheres the other?? I can only find one screw on the whole carb....

http://i1229.photobucket.com/albums/...b/DSCN1000.jpg

See photo. It hidden up under in front of the intake.