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150F idle issue

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I just bought an 06' 150f for my son. The bike starts no problem but the idle goes up and down on its own. The bike is very clean but I know that it sat for a year or two. I put new gas in it but havent done anything else. Any suggestions on what would cause the idle to do this?

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partially clogged pilot jet maybe, if it sat for a year, it probably needs to have the carb cleaned, or you can try putting some seafoam in the gas and run it for a while, it might clean the crap out.

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If it goes up and down rhythmically, it is likely the float valve is sticking. I'd pull the carb and clean it thoroughly - likely have algae growth or similar in there (from the alcohol in the fuel) - you will see a yellow green fuzz. Only use the smallest of wires to slip into the pilot jet so you don't scratch it wider - which is possible if you use a drill bit. Good father-son project - take about 2 hours including the 'lessons' you provide your son.

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Thanks for the info. It probably is a quick fix and i like the idea of the father/son project.

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You can get seafoam at any kragen, orielly, or napa auto parts, pep boys too, its a meduim size white metal can, just ask them at the counter, they'll point you in the right way.

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Seafoam is good after you clean the carb. It would not loosen up the crud for me. $9.99/pint

There are free manuals on here somewhere, 03-05, same process of cleaning for 06

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X2 My sisters does that too!

I just bought an 06' 150f for my son. The bike starts no problem but the idle goes up and down on its own. The bike is very clean but I know that it sat for a year or two. I put new gas in it but havent done anything else. Any suggestions on what would cause the idle to do this?

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