When I bought this bike, owner told me to just bump the starter(DON´T hold it down) and I´d have no problems getting it started.He was right to a point. Since I bought it it has been harder and harder to start. A friend of mine thought maybe I had a 6 volt running system and a 12 volt starting system. can this be? And what do I do to correct the problem?HELP!! Holding the starter button with a full battery charge only heats up the starter, can only staRT