There are no timing marks on any of the pulleys. All are fully floating on the shafts. You need to remove the rocker cover and use a special tool to lock both camshafts. Then you will need another tool which is a locking pin which screws into the crankcase to lock the crankshaft. You must tension the new belt with all the shafts locked and the pulleys free to rotate. Then make sure all the pulleys are tightened to the correct torque settings. If you're not sure it would be better to give the job to someone who knows what he's doing.....