Uppal Bajaj Motors - I have got Burst peace of the Bajaj Discover 150

i had brought my Bike from Uppal Bajaj Rewa on the date 27/07/2010. in the very fast day the bike get hot and give steam from the engine. then i was going to service center in the road the bike gone jam then i had gone and complain and ask for replace the bike then they have told the bike can nat be change. then he send to workers and take the bike to the service center then they gave the bike to me in evening and told there was a "MAKKHI" broken that he replced. now, from tomorrow there is a noice coming i was complain to service center where they told me to come today. i have given the bike to service center. I wanna know what is the problem with the bike please check it. I am complaining u because if you not take appropreate action. otherwise i have to complain to consumer forum.