Haven't ridden my bike for about two weeks, tried to start it today and the battery was dead. All the dash lights came on and needles swing round but not enough to turn over the starter motor. got the wife to push me to bump start it (she is well trained ) it ran ok but none of the dash was working, so no lights or speedometer. I gave it a run for 15 mins to my parents, used my dads charger for 1/2hr which gave it enough power for the dash but still had to bump start it, then the dash stopped working again. As there are no electrics when the engine is running, does this mean there is a problem with the alternator?