Engine Problem. Review on Bajaj Pulsar 180

I am ajay from chennai. I am using pulsar for past 5 years. First I bought pulsar which came with the ordinary doom then I bought pulsar dtsi. Last year I bought the new pulsar 180 dtsi with digital speedometer.  I have been using pulsar for few years . I can fell the difference of my new 180 pulsar. I am really fed up with the problem faced by me with my bike.

I have been spending more money for repairing it again and again. Its hardly only one year gone buying the new 180 pulsar. I get problem in my engine . I get a sound in engine often and it stops in the middle . I take it to mechanic and they say inside engine one bold has gone and they put the original one which costs around 1000 and my bike after changing it works well for one month and again I get the same problem and engine sound changes.

I have to again change that bold in my engine which costs the same 1000. I am really fed up and I couldn't take my bike for a long distance as it may get repaired any time any where. I have given to bajaj show room they also change the bold and again I get the problem. So friends please hepl me out of this problem. In my 5 years of driving various pulsar. This pulsar give me more problem. So kindly help me out of this problem if any one knows a good shop. [ I want a permanent solution for this problem] please contact me if u know any good service center and I dont want to spend more amount again in this bike. My e-mail id is shandoajay@yahoo.com. Contact me in this id.