Hi, I have Unicorn 150 from 2006. Recently I observed engine making "k

Hi, I have Unicorn 150 from 2006. Recently I observed engine making "kuuuur" kind of sound when speed reaches 60 or above. Once I stop vehicle it goes well and again at 60 does the same. Below 60 its good. Regular servicing was done 3 weeks back. Please suggest what would be the problem.

Asked by Srikanth on 01-01-2017

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