How to adjust a carburetor on a dirtbike?

Question:
is it just the idling screw?

Answers:

Is there a aAutomatic transmission motorcycle?

Yes, that's how i do it with my dirtbike.
Idle/screw.Do it until you here the sound not too faint, and not too loud.Though if you leave your dirtbike off with the gas valve on, it will damage your carburetor,which will cause the need to open it up and clean it which can be a real nuisance.

Cylinder sleeve or 60 over piston?

I think you screw them all the way down then back them out 2 and a half turns. Maybe you should start with one

What will happen if i will use big flywheel in my bike?

Always give year, make, engine size and model # when asking questions. It enables us to give a more informed answer. Carbs have 2 screws. The big one is the idle screw. It adjusts the idle speed. The smaller screw is the pilot screw (fuel mixture).
--Turn the pilot screw in (clockwise) untill it lightly seats, then turn it out (counter clockwise) 1&1/2 turns.
--Start the bike and adjust the idle so it runs at a comfortable speed without lugging the engine. It's always better for an engine to idle faster than slower. Less strain on the engine trying to stay running.
--Adjust the pilot screw in or out to get the motor running as smooth as possible.
--Then re-adjust the idle screw to get the correct idle.

1986 Kawasaki Vulcan 750cc. I Love this motorcycle. Is it a good for a beginner?

You need to adjust the idle mixture screw,on some carbs they put a small cap over the screw so you cant adjust them. Look on your carb and see if you have two screws,the smaller of the two will be the idle mixture screw. If you only have one screw that means the mixture screw has been capped with a little metal plug about 3/16th in round. you should be able to pull up a cut-away view of your carb on line and find the location of the plug. After you find the plug you can CAREFULLY drill out the plug with an 1/8th in bit,then use an icepick or an awl to pop the cap out, you will see the screw after you get the cap off. Then screw the mixture screw in all the way,just do it till it stops dont tighten it. Then back out the screw 1 1/2 turns,start the bike up and let the motor warm up completely.Then adjust your idle (the larger screw) down as slow as it will go and still keep the motor running. Then adjust the idle mixture screw until the motor idles as fast as it can. Then adjust the idle screw down to the normal idle RPM, again adjust the idle mixture screw until the motor revvs as fast as it can. If it doesn't make any difference or the motor slows down,turn the mixture screw back to your first adjustment point. Adjust the idle to normal RPM and you are all set.
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