For this, we would suggest you to get in touch with the nearest authorized service center as they will check the exact issue and will help you to resolve it. You may follow the link to get the details of service centers.
If you need a bike of good power and if you have budget around 1.5-1.6 lakh INR then go for fz25 or mt15 or Gixxer 250 they offer really good power . But if you have low budget don't go for hero bikes they are not at all good . Buy hornet or Gixxer 150 instead they will be better than your choice
You should go for hornet 160r for reliability, power, perfomance.