I bought this bike last October and from that time when I put bike in idle position for half an hour, it starts twitching on start up and continuing while riding. what is the possible cause for the problem?

@SVP I bought this bike last October and from that time when I put bike in idle position for half an hour, it starts twitching on start up and continuing while riding. what is the possible cause for the problem?

Question asked from: http://www.carandbike.com/honda-bikes/cb-shine