Honda Stunner — Poor performance and servicing

I have purchased a Honda Stunner on 24th Aug 2009 from Bangalore(Dhruvdesh Honda).
On 20th Jan 2010 I had done my 3rd servicing at Dhruvdesh Honda.
I had complained about the abnormal engine sound above 50 Km/Hr. Which is not been rectified during the servicing.

The services provided by the service staff are unsatisfactory.
following problems have been faced by me:-
1. observed abnormal engine sound at a particular speed ranges, above 50 Km/Hr.
2. this abnormal sound does not appers in other speed ranges
3. fuel economy is very low than prescribed by the dealer, it is just 48-50 Km/Ltr
4. heavy vibration on higher speeds above 50 Km/Hr.


Thanks

Biswa
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