For some reason bike wont turn over ?! I started it fine, rode it out the front of my house, washed it (used a bucket - only used the hose for a quick spray down at the end). Tried to start it up and the starter worked but bike wouldn't kick over. Tried with choke and tried roll start but nothing. One time it after a roll start it did catch but revved very low and then died.. Yes it has petrol and it is turned to On (also tried reserve).. Any ideas ?