[Resolved]  Honda Unicorn Bike — pulling problem

I purchased a new honda unicorn bike having engine no KC09E -1067417 and frame no ME4KC09 -3E98066080 from Vahini motors Kollam, Kerala on 28.05.2009.But this bike pass 1300km without any complaint.this time i am satisfied and proud of this bike. After that this vehicle not pulling properly according toyour design..it gives milage of 38 only.an extra sounds from engine when speed is 50-60kms. I given to the service center and complained about the pulling , millage and engine sound problem on 6-7times in Honda service center .But honda service people are not responsible, they are neglecting to solve this complaint.Now the bike pass8700kms.
I please to tell you before some leagal proceeding,i hope youwill try to solve my problem with a favour manner for a customer.