Gilera 2008 MSS Nexus User Manual page 20

Characteristics
BUSHING CATEGORY
HALVES CATEGORY
B
C
E
Combine the shaft with two category 1 crankwebs with the category 1 crankcase (or cat. 2 with cat. 2).
Furthermore a spare crankcase cannot be matched with a crankshaft with mixed categories. The spare
crankshaft has half-shafts of the same category.
CRANKCASE HALVES
Cat. 1
Cat. 2
Cat. 1
Cat. 2
N.B.
DO NOT TAKE THE MEASUREMENT ON THE TWO HALF-
SHELL COUPLING SURFACE SINCE THE ENDS ARE RE-
LIEVED TO ALLOW BENDING DURING THE DRIVING
OPERATION.
N.B.
CRANKCASES FOR REPLACEMENTS ARE SELECTED
WITH CRANKCASE HALVES OF THE SAME CATEGORY
AND ARE FITTED WITH CATEGORY C BUSHINGS (YEL-
LOW)
Characteristic
Crankshaft-bushing maximum clearance ad-
mitted:
0.08 mm
Diameter of crankcase without bushing
CAT. 1: 32.959 ÷ 32.965 mm
CAT. 2: 32.953 ÷ 32.959 mm
Cylinder Head
Before performing head service operations, thoroughly clean all coupling surfaces. Note the position of
the springs and the valves so as not to change the original position during refitting
- Using a trued bar and a feeler thickness gauge
check that the cylinder head surface is not worn or
distorted.
Characteristic
Maximum allowable run-out:
0.1 mm
- In case of irregularities, replace the head.
CHAR - 20
COUPLINGS
CRANKCASE
2
1
2
1
CATEGORIES
MSS Nexus 300 i.e. E3 ( 2008)
BUSHING INSIDE DIAMETER AFTER FITTING
29.024 ÷ 29.054
29.024 ÷ 29.054
29.018 ÷ 29.048
29.018 ÷ 29.048
ENGINE HALF-SHAFT
Cat. 1
Cat. 2
Cat. 2
Cat. 1
BUSHING
E
B
C
C