Specifications

Upon replacing the bearings it may be necessary to ream the crankshaft pin.
Before reaming the crankpin, measure the pin diameter (B) comparing it with the maximum wear al-
lowed, as indicated in the figure; this defines what kind of undersizing the bearing should have and to
which diameter the pin (B) should be reamed.
Checking shaft parallelism
Check shafts for squaring before fitting them.
It is therefore necessary to check that the head holes and the rod small end are parallel and on the
same plane.
The maximum parallelism and plane error of the two head shafts and connecting rod small end should
be +/- 0.10 mm (0.00393 inch).
CONNECTING ROD BEARING THICKNESS
Specification
Desc./Quantity
Regular 'Blue' connecting rod bearing (production) 1.539 - 1.544 mm (0.06059 - 0.06079 in)
Regular 'Red' connecting rod bearing (production) 1.535 - 1.540 mm (0.06043 - 0.06063 in)
CRANKPIN DIAMETER (B)
Specification
Desc./Quantity
'Blue' bushing half-shell regular production 44.008 ÷ 44.014 mm (1.73259 ÷ 1.73283 in)
'Red' bushing half-shell regular production 44.014 ÷ 44.020 mm (1.73283 ÷ 1.73307 in)
PIN-BUSHING COUPLING DATA
Specification
Desc./Quantity
Fitted and machined bushing - inside Ø 22.003 - 22.020 mm (0.86626 - 0.86692 in)
Pin diameter 21.998 - 21.994 mm (0.86606 - 0.86590 in)
Clearance between pin and bushing 0.005 - 0.026 mm (0.000197 - 0.001024 in)
Engine GRISO 8V - 1200
ENG - 158
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