I just set mine. It's at three turns out and is idling nice. Had to keep taking the carb off and trying 1/2 turn at a time.
if you know where the carb is then there will be a screw on it. first start your four wheeler then slowly turn the screw till the idol changes if it idols down then turn the screw the other way until it is at the idol speed you want.
The black Phillips head screw on the rear of the carburetor adjusts the airflow. You need to have it about 4 full turns into the hole and that's factory. To set the carburetor, just continue to screw in the air screw until the bike runs properly. In your climate, you will hear and feel the bike get smoother as the carburetor gets to the proper setting. Try it out and have a blast!!
The only setting is one screw on the top of each carb its the mixture screw and should is 1.5 turns out by default.
Stock setting is Idle screw - 2 1/2 - 3 turns out Air screw - 1 1/2 -1 3/4 turns out
Turn all the way in then about 1/4 turn out. This should get you close may have to twik alittle.
In most cases, you can locate the carburetor screws in the front of the carburetor. Sometimes you have to remove the air gilter to get to to the carburetor.
The 1988 Honda 350 carburetor adjustment screws are on the side of the carburetor. There also is an adjustment screw on the very top of the carburetor.
With a screw driver
You can adjust your VW carburetor by using the adjustment screws. There is an adjustment screw to adjust the flow of fuel. There is an adjustment screw to adjust the flow of air.
Use the following settings: Jet needle groove in the 3 rd position.Idle speed should be 1700rpm.Pilot screw setting 1983 model: 1-1/8 turns out.For the 1984 and 1985 models: Pilot screw setting is 1-1/4 turns out.
The idle speed screw is on the right side of the carburetor, just above the carburetor bowl (the lower part of the carburetor). Turning this screw clockwise will raise the idle speed. Turning it the other way will lower the idle speed, which is supposed to be close to 1400 RPMs. The other screw, or the air screw, should be turned in as far as it will go, then loosen it two and a half turn. If the engine runs well with this, then nothing more needs to be done. You can turn the last mentioned screw a bit more, clockwise, to adjust the air mixture. Make sure that the carburetor is clean.
if you can reach it, drill the center of the screw shaftout, then use an easy out.