If the limit is exceeded, establish which part must be changed, by comparing the valued with the values of new components.
Clearance between fork pin and groove (with new components): 0.265-0.425 mm.
Wear limit: 0.6 mm/0.0236 in.
Width of the slots (in a new drum): 8.00-8.09 mm
Wear limit: 8.19 mm/0.322 in.
Diameter of fork pin (new): 7.665-7.735 mm
Wear limit: 7.5 mm/0.295 in.
Also check the state of wear of the drum support pins; they must not show any signs of grooves, burrs and deformation.
Turn the drum in the casing to check the radial clearance. If there is excessive play, change the part which is most worn.
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