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1996 yamaha timberwolf 250

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Old 12-20-2019, 07:42 PM
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Default 1996 yamaha timberwolf 250

I'm having an idling issue it will idle low for alittle while and then idle high.ive cleaned the carb twice and it still wont go away cant seem to find a vacuum leak anywhere any idea what could be causing this?
 
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Old 12-21-2019, 03:11 AM
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Cold or hot? Engines usually idle slower when cold, so a rise in idle speed as the engine warms is normal. The speed should be set so the clutch doesn't bite when idling warm. If that means it won't idle cold, so be it. If the idle speed is wandering when warm, it could be the idle mixture not set right, or float level, or just wear in the carb. Bikes don't need to idle for long periods, but if it becomes a problem, you may need to check float level, idle mixture, or even fit a rebuild kit.
 
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Old 12-21-2019, 06:37 AM
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It happens when its warm also while I'm riding it I think I might buy a new carb and intake since there pretty cheap and hopefully that fixes it
 
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Old 12-21-2019, 08:47 PM
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Normally better to rebuild the original with a good rebuild kit, than buy a cheap foreign copy of a carb. Use spray starter fluid or add some gas in a spray bottle and spray all around the carb and manifold, if the engine speeds up you have found a vacuum leak! They can tricky to find but this method works well. An air leak on the intake will cause a lean run on an engine and will cause damage over time.
 
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