Honda Motorbike - Model Stunner
Poor after sale service and major faults in the product after few months of usage

I have bought Honda Stunner bike in the month of Aug rightnow it has run only 6000 KMs.

After the fourth service of the bike in the month of April its engine starts giving sound at every round when contacted with the service personnel they starts denying the fact, after a long discussion on the said matter their service engineer comes to the conclusion that the Piston of the bike is damaged,

which needs to be replaced. After that they had changed the piston and returned the bike, after few days the problem starts again the the service staff suggested the service of bike. But even then the problem persists. I have visited the service station of honda more than 20 times since I have purchased the bike. In the name of service they just quick wash the bike and return. Now I am looking for change of engine and want help on this matter that is it possible or not.