You can switch to reserve while running down the road.There is no separate reserve tank.The petcock assembly has a standpipe up in the tank that,when on main supply mode,keeps the bottom portion of the tank from draining.When you switch to reserve,the standpipe is bypassed and lets the last of the fuel drain to the carbs.
It's a good idea to get familiar enough with the location,and function,of the petcock,that you can reach down and switch it over without looking.
Additionally,there is a small amount of fuel that gets trapped on the side of the tank opposite the petcock.So,if you run completely out of fuel,you can lean the bike over to the left,and maybe splash enough gas over to the petcock side to get you to a gas station.
This next part is
very important.As soon as you pull into the gas station,or at least before you pump your fuel,SWITCH YOUR GAS TAP TO EITHER OFF OR TO MAIN FEED ON. UNDER NO CIRCUMSTANCES LEAVE IT ON RESERVE!
Cheers!
Bruce
