I bought one of your mini cobra four wheeler bikes and it took 2 hours to start up the first time then it refused to start again. I tried putting new gas in. In addition to that the four wheeler came and was all scratched up.  I had the mixtures of gas and oil right and it wouldn't work.  I finally got it to work after lots of work then it would just randomly stop running every few minutes.  This four wheeler has a horrible quality and the only thing you told me was that you would send me a new part. After I installed the... read full review »