Hi,

I don't know how good is your bike. When I bought my NSR it had the same problem. I have done everything possible, and tried all Oils available.

The problem was in the exhaust pipe. Finally I have dismantled it, and one will not believe what was inside. It stopped smoking and it start to speed up better as well.

May be you should try this. However, note, that my nsr was in the garage for more then three years when I bough it.

Try, may be it will help.
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