Gilera 633721 Workshop Manual page 170

Engine
- Insert a new bearing on the special tool after
greasing the guide seat.
- Install the new bearing on the engine crankcase
using the special tool.
N.B.
IF A BEARING WITH PLASTIC CAGE IS USED, KEEP THE
BALLS VISIBLE FROM THE CRANKCASE INTERNAL
SIDE.
Specific tooling
020376Y Adaptor handle
020359Y 42x47-mm adaptor
020439Y 17 mm guide
Inspecting the crankshaft components
- Check the axial clearance on the connecting rod.
Characteristic
Standard clearance:
0.20 ÷ 0.40 mm
- Check the connecting rod diametrical clearance.
Characteristic
Standard clearance:
0.046 ÷ 0.076 mm
-Check the surfaces that limit the axial free-play
are not scored and measure the width of the crank-
shaft between these surfaces, as shown in the
diagram.
N.B.
BE CAREFUL NOT TO LET THE MEASUREMENT BE AF-
FECTED BY THE UNIONS WITH THE CRANKSHAFT ENDS.
Characteristic
Standard dimensions:
63.6 - 63.45 mm
ENG - 170
Nexus 500 euro 3