Where can I buy new ball bearings for the front forks on my 1970 Hodaka Ace 100 ???

I need to know which way the arrow on the top of the piston faces toward the front road in front of you or toward the driver or back of the bike I think it's toward the front forward

I need to know which way the arrow on the top of the piston faces toward the front road in front of you or toward the driver or back of the bike I think it's toward the front forward