OK I just got done riding my and noticed it was running a little rough so I pulled the plug out and it is BLACK. Anyway I know this means Im running rich and I were working on a Holley or Edelbrock carb I would know what I was doing but these Japanese carbs are so foreign (no pun intended) to me. I keep seeing everyone talking about moving the clip and all that. Is the clip basically the metering rod? If so where is it on this thing and which way do I move it? I plan on going to the dealership tomorrow to get a few jets but I need to know what sizes to look for. I live in DFW tx and have no idea what the altitude is here but all the adjusments and jet sizes are still stock. Also the bike runs like a bat outta hell and has no stumble anywhere unless oyu let it sit for a sec and just open it all the way then it stumbles but I know that is because it is running rich and loading up. Thanks for all the help in advance.

 

anyone?

 

The clip is the metering rod... YES...
\Unscrew the top peice, where the cable goes in.., you will see the rod coming out the bottom of a round thingy ma jiggy.... it is a pain in the ***, but the spring must be moved off to the side. You do not have to take the cable off.... Once you have moved the spring, remove clip inside, and pull out clip... move the clip up (richer) down (leaner)... This is as I am sure that you know, only off idle.... I hope that helps

 

k, sporty is *** backwards Lason. move the clip down to make it richer. (this way the needle cant go into the jet as far) move the clip up to make it more lean (doing so keeps the needle further down into the jet not allowing as much fuel through. and these adjustments make most the differance higher on the revs. to adjust a stumble off idle use the mixture screw. hope this helps.

 

Thanks guys, I appreciate the help. Also am I right in assuming to gain acces to the main jet I need to remove the bowl on the bottom? I just put a new set of bars on and took her out and it had NO power. I will start screwing around with her later tonight or in the morning. Thanks again.

 

yes the carb will need to come off and remove the bowl to get to jets. when i first installed my 20mm carb it had a terrible off idle stumble that was corrected by dropping the needle (raise clip)

 

I guess I'll figure it out when I do it but I still cant figure out how raising the clip drop the needle. By raising the clip you mean moving it towards the cap on top of the carb right? Anyway like I said the bikes ran great but the plug is BLACK! I am going to pick up a couple more plugs and take note of all the settings and maybe goof around with it tomorrow morning.

 

yes, by raising the clip it drops the needle further down. take it apart and u will see. if it is running fine but has a black plug, chances are, one notch will make it run perfect. try it out.

 

I know a lot of you guys have the Keihin carbs., but does anyone out there have a Mikuini carb.?

 

OK I messed with the clip and went one higher and got black smoke, went one down and slower response. I messed with what I think is the air/fuel mix and screwed it in a smidge and it wouldnt idle very well, went out and it lost some of its response. I guess its in my jetting. I noticed that it doesnt like to rev from idle too well either. It will bog a little. I am so lost

 

thats one of teh worst thing to do...mess with more than 1 thing at a time whil ejetting a carb. Get it idlign well, and then move the clip up one..heres a good carb guide...should be the same thing btu this one is for atvs

http://www.exriders.com/techarticles/jetting.html

 

Im sorry I didnt explain. I only did one thing at a time then tried to tell a difference then went back to where it was then tried another. I didnt do all of that at one.

 

Ooopss... Sorry.... I made a mistake... I just got mixed. up, sorry that is what I meant, sorry for teh confusion