How do u adjust the throttle and fine tune carb also how do you know that injection pump that mixes with oil is working

Question edited to add maker.
Question moved to the correct category 'make model'.

Remove the throttle body and clean it thoroughly. It is staying open.

https://www.google.com/search?q=Suzuki+KingQuad+500+that+surges+at+idle

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Have you checked the Crankcase seals? I have 2 Big Bosses with 250's. 1989 + 1992

Both were terrible at starting and idling....after much troubleshooting I finally changed the crankshaft seals. (Which btw looked fine from the outside!) machines can be Cold now and will start 2 or 3rd pull with the cord now. Idle perfectly.

Also the oil injection system stopped working intermittently. Machine would just quit.....crank and crank it forever. So I just started using 32/1 mix and unhooked the Oil Injection cable from the Throttle.

Sounds to me like your not getting enough fuel change fuel filter and tak gas out of tank and clean it out a few times as the screen in the tank may be clogged also if you have an electronic fuel pump make sure it is working properly

Sounds like a air leak maybe.,.or a sticky or kinked throttle cable check that lube or replace .,.clean your air filter, and intake ,and carb / fuel injection parts., tune it up?

Full tune up and carb clean .get new plug,air filter.oil Chang ,carb clean and adjustment.that should do it.,., try fuel filters and test fuel pump see if it's functioning properly.,.

sounds like your high jet in the carb is either clogged or you have water in your fuel.

If you've rebuilt and adjusted the carbs to the correct spec, and the air fuel mixture is right, it would be worth checking the fuel filter if one is present, as well the fuel pump (again, if present). These are typically the first place to look when you idle fine but die out on throttle.

As for the belt light, it depends on what it indicates. Wear? Tension? If the belt slips, or is too tight or too loose, it could also cause stalling under throttle. With the engine off and cool, check it for cracks, splits and wear, and give it a light tug with two fingers. It should have a small amount of play, but not enough to feel like you could pull it off. If it feels like a steel rod, it may be over tight.

If all of these things are fine, no clogged filters, etc, it's maybe time to look at the distributor, and recheck those carbs.

your going to have to adjust the throttle pin that goes down into the carb.It has a few notches on the needle when you take the assembly off take the clip off the notch its on and bring it down one notch should fix problem if not go down another until you hit the sweet spot.good luck

Hello Anon..
First, I would check to make sure the carbs are getting fuel, and then fuel getting into the cylinders. Your question about low oil - did you let it get low and then it quit? ...
If you put oil into the cylinders and only got 100psi, this might be your problem. You should be pumping around 120+psi without putting anything into the cylinders... Recheck the compression.= .take out all spark plugs...screw the gauge in until the o-ring seats, hold the throttle wide open while spinning the engine over for about 5 seconds... you should get 120psi +/- 10psi.
If you are getting less than 100psi.. it might be time for a rebuild..

check your float height? sounds like its high and runs normal when cold like the choke is on but when warm its getting too much fuel.