2003 Yamaha YZ 125 Logo

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Posted on Dec 21, 2009
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Yz 125 bog

I have a 2000 yz 125 i have bog problem when you try to ride but revs good in neutrul

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Colin

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  • Posted on Dec 21, 2009
Colin
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Joined: Aug 11, 2009
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Sounds too lean to me or lacking fuel.

Partially blocked jet in carb. May have to remove / clean.

Check also that carb butterfly / piston is travelling to full open position.

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I just got a 1994 yz 125 and when i was riding it ,.. it would run good as long as i was going slow and not raping out the gears .. but when i would give it a lot of gas to take off it would bog out and...

if the plug is sooty your float is set wrong the air filter should have oil on it to catch dirt.sounds like a carb problem although it could be the power valve
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Bike revs uncotrollaby. 125 yz 2002

Is the throtle cable stuck? if not look at a good carb clean, it could have enough gas to start but be too lean that would make it rev up. Two stokes also do this right before they run out of gas
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2003 yz 125 stalling

sounds like the clutch is grabbing rip it apart and take a look
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