Hello riders
i own a pulsar150(UG4.5)(9,000K.M.S done)
I'm having trouble with my pulsar for a while and I've tried every rule in the book to fix it.
The problem started when i removed the chain cover(pulsar150 has closed chain cover) to add looks.
and i re-installed it after a couple of days due to rainy conditions.
Since then i noticed there was a strange humming sound coming from the chain near the rear end.
After careful observation i learnt that the sound starts coming at an exact speed of 55-60 NOT MORE NOT LESS
and after removing the chain cover it's gone!!!
I would like to describe the sound as a humming sound not a scratching sound,
So i removed the chain cover, cleaned the chain
and chain sprockets thoroughly.
Also checked the chain slackness and rear wheel alignment
I even replaced the chain link lock thinking it might had worn out.
Then after all that i carefully installed the chain cover in it's right place following all the precautions.
I even checked for bends or cracks in the chain cover and carefully ensured that it was not rubbing against the rear Tyre.
But the problem still continues....
I even took it to an authorized service center, and i demonstrated the problem by riding with him.
He cleaned the front sprocket and did some oiling but it was of no use.
The noise is so much that i can't ignore it SERIOUSLY!!!

a little help from fellow bikers please.....