ok so rode to work, then when i came to leave started the bike as normal, then it cut out which happens if choke isnt in, so engaged choke tried started aghain but lo and behold it just ticked over and wanted to start but wouldnt!!!the more i tried the more i drained the battery , also had it serviced last week with new chain and sprocket set from yamaha dealer, any help would be mucho appreciato!