Carb adjustment

[xJust_Causex]

I was wanting to richen up my motor a bit to be on the safe side. I think rejetting will be to much and I don't have any jets to use. I was thinking about moving my needle and maybe a little adjustment on the air screw, but I don't remember which way to go to richen them up.

Thank You
Levi

 

[motoman9911]

To richen using the needle you go down a clip. As in put the clip on the slot that is more towards the middle of the needle.

 

[brandoz28]

the lower the clip is on the needle, the richer it will be.

this will only adjust the mid throttle fuel mix on the bike

 

[xJust_Causex]

Needles mid to full throttle, and air screw is more idle to 1/4-1/2 throttle I thought, maybe I'm wrong, but that is why I ask these questions.

 

[brandoz28]

air screw is idle-1/4, needle is from there to 3/4, main is full throttle


however the main does have a trickle down effect in the mid throttle as well

 

[xJust_Causex]

Hey I was close, lol. But alot of my riding is in that mid-throttle range most of the time, and I was hoping that it would help a little bit on top. I will eventually pick up some jets and may jump it up, but I'm afraid that it will be too much on top.

 

[brandoz28]

really you should have your main jetting right and then adjust the needle

 

[bonzaiking]

please read the topic about jetting it works for everyone I:I

 

[xJust_Causex]

Well it's stock jetting on a stock bike.

 

[xJust_Causex]

please read the topic about jetting it works for everyone I:I

the only one I found was for the kliehn carbs, I'm running the stock mikuni and I'm not sure how similar as far as jetting they are.

 

[brandoz28]

one and the same really. the theory applies to all carbs that are setup like that

 

[nd jat]

one and the same really. the theory applies to all carbs that are setup like that

At least as far as 2stroke carbs, 4stroks the air screw is opposite as far as I've seen in literature's. But never messed with a 4stroks carb to know for sure.