smoking 88xr250r

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?

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.

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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