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Old 01-24-2019, 07:00 AM
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Default 2003 yz125 throttle valve

     

Throttle valve has a chip in it. Yamaha OEM 160.00, I heard I could use one out of a 04 or newer cr125r 60.00 dollars. Does anyone have information about this. Cut away on mine is 4.0 and for what I'm seeing Honda is same.
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Old 01-24-2019, 09:17 AM
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As long as it's the same make/model of carb (IE Kiehin PWK, Mikuni TMX etc) it will be fine.
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Old 01-26-2019, 11:07 AM
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Yamaha slide cut is 4.0 Honda is 4.5. Will that effect much and how would I adjust to it? Thanks
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Old 01-28-2019, 09:18 AM
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You could modify the 4.0 to 4.5 if you can find the spec. May not be necessary though, the cutaway only affects idle/off idle response if I'm not mistaken. 4.0 would be slightly leaner than 4.5. Here's a great article explaining things in depth- Safely Jetting your two stroke dirt bike. - KX Guru Racing
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