Gilera Nordwest, Workshop Manual

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INSPECTION
After a thorough cleaning of all parts, inspect all components carefully.
All those parts that show sign of wear and/or damage must be replaced.
Crankshaft
The crankshaft must be replaced if found damaged or worn.
Connecting rod
Install the half bearings and mount the connecting rod cap by tightening the
nuts to the proper torque setting (28 to 32 Nm). Measure the internal
diameter of the bearing with a micrometer.
Once the bearing and shaft journal diameter is known, it is possible to
calculate the radial clearance of the two components.
Clearance at mounting: 0.017 to 0.060 mm.
Max. clearance: 0.14 mm.
If it is necessary to replace the wrist pin, use special tool 19.1.20506 for
removal; to install use special tool 19.1.20505. Be careful to align the pin
lubrication hole with the one in the small end.
Connecting rod cap radial gap must be between 0.15 ÷ 0.25 mm.
It is recommended to replace connecting rod bolts at every overhaul.
Note the fitting of the connecting rod cap; mount the connecting rod in the
same direction it was taken out.
Gearbox
Make sure the selector forks aren’t bent and move freely on their shaft and that
there is a minimum clearance in each of the guide bolts inside the slot of the
selector drum.
Verify that the gap between the fork and gear train slot isn’t excessive.
Check carefully the condition of the gear train and be sure that the mainshaft,
transmission and fork shafts are perfectly straight.
Max. straightness error = 0.05 mm
10 - 3,1