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smoking 88xr250r

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I just got a 1988 xr250r running i have not change the oil just started a couple of times and shut it off.The bike smokes and stinks starts on the first kick and sounds good just wonding if smoke is just carbon burning off?

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Did you just rebuild it or is it a bike that has been sitting and you just got it running again? If its a fresh rebuild it could be any assembly lube you used burning off. If its been sitting more than likely its valve seals, but rings could be an issue too. I guess put out more info and I am sure someone here can help you.

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Change the oil,and go for a good ride to blow out the cobb webs,then see how its doing, then get back to us.

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