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crkid

2005 Yamaha Kodiak 450 High Idle

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2005 Kodiak 450

Have had this quad a little over a year now. Bought used with 700 miles. Always had a tiny high idle after being revved up and after about 15 seconds it would go down to normal idle.

Up until now we have completely cleaned the carb, all ports, jets, float and needle, new spark plug and have also adjusted the intake and exhaust valves. Intake was where it should be right within specs, exhaust was at the looser part of the spec so we tightened it up to the middle of the specs.

It runs a lot better after all that, but there is still a tiny little bit of high idle after being revved and the rpms fall back down, maybe 3 seconds if that. I took the spark plug out and it is basically white, like its burning a lean mixture, its not burning a nice golden brown color on the plug.

I would like to start with the fuel screw to try adjusting it a little to see if it would help, but I cant seem to find it. Could anyone give me some help of where its at and if its recessed in the carb a little?

Has anyone else had this problem? What do yall advise to do?

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Part 39 is the idle adjustment. The idle is set correctly, just having a tiny high idle problem after being revved. Im looking for the fuel adjustment screw.

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Thank you a lot! also, the pilot screw is under the bowl of the carb, but it is closer to the intake side which leads me to believe it is an air screw, but I know most 4 strokes have a fuel screw. Do you know which it is? just so I know which way to turn it.

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