Honda PC50 Owner's Manual page 36

iw*59i
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After completing the adjustment, make sure that the rear wheel is in
alignment by checking to see if the alignment mark on the drive chain
(3)
adjusters on both th%|tight and left sides are in the same position in
reference to the alignment m,grks (2) on the rear fork.
Rear wheel which is out of alignment will cause poor road holding.
3 4