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Ok.. That's good. So.. running for a few minutes and then starting to run lean is not a jetting problem. A jetting problem happens the second the fuel starts trying to flow through that jet.. not after a few minutes running. You need to check the fuel supply is getting to the carb. The best way to do that is to undo the drain screw. That tests the tap, filter, and the float needle are all allowing fuel through. It needs to keep running even after the carb is empty. If t starts slowing it could be a dirty filter in the tank, or a vacuum because the tank vent is blocked. If the tank vent is blocked it will likely take 15 minutes to show a problem, if it's the float needle blocked it will take abut a minute to three depending on how blocked and how you are revving it up and stuff.. Rough figures but you will get the idea.. If you get the fuel supply problem sorted, then the carb(and jets) might not need too much.. we hope.

It's really bad so many people are throughing away their original good carbs because they can buy aftermarket replacement cheaper than a kit. I found a seller on Ebay that sells brand new Mikuni carbs for about 200 if you are interested. I am on a quest to replace all the carbs on my bikes with original only one more to go. I have bought 3 bikes in the last year and all had aftermarket carbs on them.

I'm jobles09, or Jay for short. New to the forum. I'm here cause I'm looking for wiring diagrams for my 1988 suzuki quadrunner 250 4x4. Got it from a friend. Didn't run when I got it. Has been flawless for over a year. Took it on the trail fist time, and it developed a short in the neutral / staring system. That's why I'm here. 4 wheeler is told to just got buy this info. Would like to find a service manual if it was still possible. Anyhow 👋. Cant wait to see the responses.

I'm darrell from Northern Wisconsin. I just bought a Suzuki 1987 Quadrunner 250 4x4 to move boats, etc. around our proper4ty. At 80 I still enjoy the outdoor life but need all the help I can get !!!

a friend sent me this pic of a canadian moose hunting trip gone bad ...i just had to put it on here ... another good funny brought to you by the post miner