hi chaps ive a 2004 hayabussa, its been sitting in a garage for 4yrs ... ive bought it its a great looking and riding bike but.... the battery wont hold charge, when riding it after giving it enough charge to get it to my house , all trhe dash lights lit up, the speedo and rev counter needles went from one side to the other then back again but through all of this the bike still rode just that if i stopped the engine would cut out and i needed another jump start to carry on ........... any ideas what could be wrong ... ?