Betamotor EVO 4t, Workshop Manual, Page: 58 / 80

52
ASSEMBLY
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Fit the idler gear (1) on its pivot pin with the con-
cave side facing outwards, fit the special 11x17x0.5
washer (2), and secure with the circlip (3).
Fit the primary transmission gear (4) with the convex
side facing inwards, taking care to align the keyway
with the woodruff key itself. Position the 18x30x3
washer (5).
Lock the crankshaft at TDC using the appropriate
bolt (7), then tighten the nut (6) to 150 Nm.
N.B. Check the wear on the gear teeth before car-
rying on with assembly, and oil well all the parts that
are in contact with each other.
4.12 CLUTCH
Fit the 20x32x2 washer (1) and the bush
(2) onto the gearbox mainshaft after first
oiling the two components and the shaft
itself. Check the bush for signs of seizure
or excessive wear. If these are found, re-
place the bush. Also measure the clea-
rance between the steel bush (2) and the
bush in the clutch basket (3).
Standard clearance 0.010-0.112mm
Before you fit the clutch basket, check the wear on
the teeth of the primary transmission gear (A) and
on the gear (B) which carries the drive to the oil
pumps. Check too the condition of the teeth (C) on
the clutch basket which engage with the drive pla-
tes (8). Manually check that there is not excessive
tangential play in the relative rotational movement
between the clutch basket and the primary gear
which is fitted to it via the silent-block. Unscrew
the TDC locking bolt to facilitate assembly of the
clutch.
Fit the 18.3x35x2 washer (4) after first oiling its
housing in the clutch basket assembly (3).