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Yamaha Moto4 1989 250

This is a discussion on Yamaha Moto4 1989 250 within the Other Models/Brands forums, part of the Performance /Technical category; I have a 1989 Moto 4 that has started backfiring through the carb when it is cold. Not all the time just occasionally. Is this ...


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Old 01-09-2012, 11:48 AM   #1
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Default Yamaha Moto4 1989 250

I have a 1989 Moto 4 that has started backfiring through the carb when it is cold. Not all the time just occasionally. Is this a timing problem or is it just because it's cold.
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