Puch 1980-1981 Maintenance Manual page 76

ASSEMBLE ENGINE - 2 SPEED
Place first speed gear onto main shaft.
•
Re-fit special nut (left hand thread) into main shaft and tor-
que to 25-36 ft/lb (35-50 Nm). Remove second speed gear
locking tool.
.
Insert the first speed gear rollers, by pushing springs back
and placing rollers in position against the spring tension.
Remove engine from engine stand and place on assembly
table.
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