-( Story related, cannot be missed )-
Objective: gather fuel for the bike.
* Before attempting the gas tower, make sure that you have picked up the hose and gas can from Mo's garage, else you will need to make more trips to get this objective fulfilled.
After evading the cops, the vehicle will be safely parked beside the tower. Use the hose on the vehicle's gas tank, then the can right beside it. All that's left is to activate the manual gas transfer pump by using the MOUTH icon on the hose.