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post #1 of 4 (permalink) Old Today, 11:47 AM Thread Starter
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gofasttoys's Avatar

Join Date: Jan 2018
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trx500fe idle

Hey everyone new here my first post so bear with me plz. I have a 2006 trx500fe foreman the problem I'm having is after the engine warms up. The idle just randomly takes off and starts reving higher "" until I shut the motor off. Start it back up then its fine for a few then it will happen again. This is only happening when its not in gear. It has never done it in gear. Yes I should be looking for a intake leak but its only after the motor warms up. Things expand when they warm up so I don't think its a base gasket or anything like that. But ive been wrong before lol. Any help would be great thanks. Electric shift if that matters
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post #2 of 4 (permalink) Old Today, 11:58 AM
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location: Eastern Arkansas
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Welcome to the forum. I was going to say intake leak.

Spray some starter fluid around the intake boot and see if it speeds up.
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post #3 of 4 (permalink) Old Today, 02:50 PM
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Look at the post a month or two ago:
Increasing RPMs

It may be your pilot screw needs adjustment.
Common on Chinese carbs, but also happens on OEM carbs.
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post #4 of 4 (permalink) Old Today, 03:13 PM
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There is almost certainly a lean condition. I would guess a dirty pilot jet. Engines do not require as much fuel when hot as they do cold. The idle has probably been turned up to compensate for a low or erratic idle due to fuel starvation. I'd clean the complete carb just to be thorough.
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