I just bought a second hand bike from an acquaintance. Its a Kinetic Velocity 04 model. Although its pretty old but has done only 20k kms and is in pretty good condition, so i went ahead and took it.

Im a complete newbie to biking, so i have a few questions.
The bike is 115 cc and the max speed it reaches is 80kmph, and it vibrates like hell on that speed. Is that the max such bikes can reach or can i get it increased somewhat.

Another issue is the sound it makes, even when at 60. What could be the problem? it feels as if it is trying too hard even at 60. I seriously hope that it's something that can be sorted out with a good service.

Please help.