Need to find out carb settings air fuel mixture screw and idle screw how many turns out from seated position

Hi scooterbu850,
You indicate you replaced the carburetor kit, did you check for dirt and clean the carb and install the kit very carefully, and make sure all the gaskets on the carb and between the intake and carb have no air leaks? The first thing is to try to adjust the low speed screw to give you a faster idle, it is the screw with a spring, on top of the carb where the throttle cable hooks up. Turn it in (clockwise) to give more idle speed. Now locate the mixture screws on the carb, they are on the side of the carb and also have springs on them. They are marked with an L or H on the carb body beside the screws. Turn them both in (clockwise) until lightly seated then turn them out (counterclockwise) 1 turn or if you prefer turn them to the position they were before you took the carb apart. 1 turn out is the recommended position by the manufacturer so the engine starts and runs, sometimes this is the right position. If it does not idle properly, remember this position and turn the idle mixture screw out (counterclockwise) in 1/8 turn increments until it runs properly 5 or 6 times or more if it runs better. (When turned out you are adding more gas to the mixture). You could also try the high speed mixture screw and see if it helps with the idle, but do not turn in (clockwise) to less than 1 turn out from a lightly seated position, to prevent overheating. If this doesn't help, check the air and gas filters, the gas tank and fuel lines for blockages. Check the spark plug to see if it is wet and if it isn't no fuel is getting to the engine. These are a few suggestions for you to try. Hope this helps a bit. All the best and good luck.

The bottom screw on the carburetor is the main fuel mixture screw, turn this "in" slowly until is "seats" and then back it out two turns. The idle mixture screw is located on the side (do not confuse with the idle speed screw), turn this in slowly until it seats and then back it out one turn. This will get you in the ballpark but it will have to be fine tuned from their. The proper adjustment is between a "lean" running condition (engine will try to cut off) and a "rich" running condition (engine will load up). The main fuel mixture is adjusted at full throttle position and the idle mixture screw is adjusted at idle speed. Once this is done, you can adjust the idle speed screw in the low throttle position. Hope this helps.

Hi, Gerald I will try to help. The high speed mixture screw basic setting is about 1 1/4 turns out from lightly seated position and the idle or low speed mixture screw is about 1 turn out from lightly seated position. To get the manufacturers basic or start out setting, remember the position of the screws before you start any adjustments. Both are done the same way. Turn adjust screw in or clockwise until lightly seated (so the soft metal is not damaged when seating the screw) then turn out or counterclockwise, high 1 1/4 turns and low 1 turn out. Do any adjustments in 1/8 turn increments until you get running. Do not turn the high speed mixture screw so there is less than 3/4 of a turn from seated position, The reason is not to run the engine too lean so engine does not overheat. When turning the screw in, there is less gas in the mixture, therefore when turning out you allow more gas in the fuel to air mixture.
The problem might not be adjustment, it could be many other things causing it not to run properly. Make sure the air filter is clean, the fuel filter in the tank is not plugged up. Spark plug might be fouling up, the fuel lines might have dirt or starting to go. The fuel tank is usually vented by the tank cap and might be plugging up not allowing enough air in. Check the bolts screws and gaskets of the carb so there is no air leaking in.
The carb might need an overhaul, cleaning and maybe a carb kit.
These are suggestions to help diagnose the problem. I might have forgotten other things to check out. I hope this helps you out a bit. All the best and good luck.

There are actually 3 screws on the carb. The big one is the most important, it adjust the high speed fuel mixture. A good starting point is 2 1/2 turns out from fully seated. There is a small screw which is located right next to the air intake. This is the idle stop and should be set so that the engine idles smoothly. The third screw is located on the side. It is also small and it controls the idle fuel mixture. A good starting point for the idle fuel mixture screw is 1 3/4 turns out from fully seated.

start by synchronizing your throttle plates. Honda calls the next step the "idle drop procedure". u need to know if you have fuel adj. screws or air adj. screws. fuel screws will be on engine side of carb slide, air screws will be on airbox side of carb slide. start leaning out mixture, (turn in fuel screw, turn out air screw. idle will increase so keep adjusting idle back to spec.after each turn if needed. Adjust about 1/4 to 1/2 turn at a time on each carb until there is no change in idle, then richen up mixture by one half turn. If u sync throttle plates first then follow this procedure, there should be no hesitation when you "blip" the throttle, and after revving it should return to idle smooth,

you should have 3 adjustment screws. the one marked T is throttle idle position,adjusts idle speed.Lo adjusts air-fuel mixture at low rpm,HI at high rpm.H & L should be 3/4 to 1 1/2 turns out from a lightly seated position.adjust for best rpm's at Lo,then Hi.turning idle screw in too far would not affect starting,only idle speed.