i just got a 73 750-4 chopper. last taged in 01. he had the gas drained while he had it in his garage thru the yrs. when he put it up for sale he said he had the cards cleaned, put on new fuel filters and a new battery and changed the oil. the bike will start up and idle if i turn in the little external adustment screw on the carb arm that runs across the four carbs. it dosent seem to want to stay running long enought to be able to put the chock lever on the side in the down position. after i restart it 6-8 times from it stalling then the battery gets weak and clicks. what is a good starting point to investagate the problem? if someone cleaned the carbs for him could they need sycrinized? could the wires in the chargeing system need checked? is there someone in central ohio that is a 750-4 guru who could help me? i am in marysville ohio....thanks