Nessmuk

Bout got it figured out.

The front of my manual says the mixture screw is 2 and 5/89 turns out.

I converted 5/89 to mm and did my best, for years.

In the carb section it says 2 and 5/8. That's not only easier, but works a LOT better.

Head slap, big duh-ert moment. 

Well, none of the rebuild kits fit 100%, and the needle valve seats don't remove (pressed in), and they come with one of two different sizes of choke threads.

I never get a wide open throttle. It starts sputtering.

Right now it needs full choke to run.  This carb was fine until it got junk in it, despite a good paper filter.  I dissembled it and cleaned it, (Ultrasonic cleaner and air). 

I had about 50 paper filters I bought in bulk that came apart in the ethanol fuel. It's not one of those. 

Oh, btw, it is a 94-97 model. 300cc +/- (280cc)???

A great quad otherwise. New tires. Tight u joints and CV joints. Repacked and new boots. Other than a harsh couple tumbles down a mountain side that bent my bar and racks, a real sweet machine.

I'd really like to end the carb issues. I only run non ethanol gas, and Rotella 15-40 engine oil.

I keep the filters changed and have a good paper filter in the fuel line. I rebuilt the fuel pump and petcock.

The front diff has been drained and refilled with proper gear oil. 

I do need to seal up the exhaust. I mounted an automotive muffler I found that fit and had the correct size inlet pipe. I have leaks where it meets the header pipe. 

Very tired of the Chinese carburetors. I don't have an original.

Which of these would be best, and how to make the cable connections?

https://www.powersportsid.com/mikuni/mikuni-vm-series-round-slide-carburetor-2051282452.html?vehicle=11510

Also, any idea on what size the muffler clamp is?