I am trying to tune in my Cool Sports Wolverine 250, and it would greatly help to have a carb diagram, labeled.

It runs rough, spits and sputters and it would be alot easier to tune if I knew for sure what the adjustment points are.

I have tentatively identified the mix screw and for sure found idle adjust, but would love to know where the air screw is, etc.

It looks like an older slide type with the mix screw (?) on the front bottom of the carb. It's a slotted "screw" with what looks like grooves cut in the side for grip?

 

That sould be the correct screw. Thats were they are on the Jetmoto 200. If you havn't already I would start with a new plug though. Try a NGK D8EA. Sometimes its just that easy. [img]i/expressions/face-icon-small-smile.gif[/img]

 

I was going to pull it and clean it tonight, I'll go ahead and replace it with one I trust though, that's a better idea! Heck, it's only $2.50.

 

You can read my How to carb tuning tips article. The air screw is always before the idle screw on the airbox end. You cant adjust idle before you adjust the airscrew. Read the article and you will have it tuned in no time.

 

I had read that, but you never mention anything about what to do with the airscrew. BTW, my mix screw is actually on the bottom front of the carb, so it doesn't really match your description. but I think I found the airscrew and the bottom back of the carb, near the mount for the air system.

What direction would you recommend setting it?

 

I did explain air screw. Step 4 and 6 . Read it again carefully. All the steps are there. the air/fuel mixture is the most important adjustment. If this is not set right it will never run right.

If you have any screw in the float bowl its not an air screw. Thats a drain screw. The air screw is before the idle screw closest to air box not the manifold.

 

I gotcha, in this thread you're saying air screw, while in steps 4 and 6 you're saying mixture screw. air/mix screw right? I think we're on same page then, if there's a seperate air screw, then i'm still confused.

Maybe this will help, here's a pick of the left (clutch) side:
carb

This side is the choke. In the lower left, is a screw with groove. I am calling this the fuel/mix screw.?
On the other side is the throttle assembly, and the idle screw is right in front of this.? Or is it on choke side. the screw with a spring on the choke assembly?


Here's your 4 and 6:

4. Turn the mixture screw clockwise until fully closed,
then turn the mixture screw 2 full turns out.
5. Adjust the idling screw until the engine idles EASILY.
6. Turn the mixture screw slightly clockwise and
counterclockwise until the highest engine REVs obtained

 

That screw in the pic is the correct one.

 

Chopper400ex,
Can you give the other guy some advice on the carb issues or chime in...it may be a simple problem. I'm testing you[img]i/expressions/face-icon-small-smile.gif[/img] SEADAWG

 

Thanks Chopper!

I just need to get it dialed in now. It's running pretty good except at idle, it tends to stall right now. Runs strong when riding though!