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07 cr125 mod

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Well I always ran 32:1 but I bought this bike and it seems to be running real rich. What ratio do you run?

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Well I always ran 32:1 but I bought this bike and it seems to be running real rich. What ratio do you run?

Ratio is fine, If it's rich you need to jet it differently

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ref leaking oil out of header pipe:  My sons CR85 leaks an ugly black sludge out of his header pipe .  could it be lack of O-rings because today some one recommended rebuilding the top end  not sure why its spewing the sludge, but I would like to get it resolved

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