Ok guys here is the problem I had a go on my mates bike WTO volta2011 and I liked it that much I bought 1 new at a super good price so I got it delivered yesterday to me house built up already for me all I had to do was put the peddles on straighten the bars then I was away I wheeled it outside into the street I make sure everything was tight already and set off as soon as I set off there was a cracking/popping nose comming from the cranks I thought this was because it is a new bike maybe it just needs running in so I just rode rounds town for few hours and this is slowly going it is not as bad as when I jumped on straight away but it's still doing it running a half link chain and the chain has a slack spot has this got somet to do with it but everything is straight the cranks ain't bent as everything is new and checked and nothing is bent or looks abnormal sould I say but there is a slack spot in the chain and there's a cracking popping noise comming from down there soon anyone can help me out here please much appreciated oh and I didn't do anything on it other than just ride it around town a while to get used to the ride it's a WTO Volta 2011