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Old 06-24-2017, 10:36 PM
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Moto sorry not a dirt bike but have a cbr250r 1989 and is revving high on idle and smoke

     

i know its not a dirt bike but always used this forum... i have a cbr250 1989 and it is blowing alot of smoke looks greyish but was in bare feet and have black dots all over them so im guessing its running rich but i could be wrong?
coolant and oil looks fine - is also smoking out of crank case breather that goes into airbox and sometimes backfires out the back of the carbies and exhaust
https://www.youtube.com/watch?v=HB0-boFLr7k
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Old 06-30-2017, 11:46 AM
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Very old topend and most likely your right side crankseal is giving up on you.
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Old 06-30-2017, 02:51 PM
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That looks to be a 1989 NSR250. but i'm just splitting hairs over here

ahh, no I'm incorrect. Just a model of CBR that has never been brought over to the states.
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