Splitting the crankcase halves
- Remove the ten crankshaft coupling screws.
-Separate the crankcase halves keeping the half
casing driving shaft engaged on the transmission
side.
- Remove the crankshaft.
CAUTION
IF YOU FAIL TO DO THIS, THE CRANKSHAFT MIGHT AC-
CIDENTALLY FALL.
- Remove the oil guard on the flywheel side.
CAUTION
THE CENTRIFUGAL OIL FILTER IS IN THE FLYWHEEL AXLE SHAFT. CONSEQUENTLY, DO NOT
WASH WITH SOLVENTS OR BLOW COMPRESSED AIR SO THAT NO IMPURITIES LEAK OUT. A
CENTRIFUGAL OIL FILTER'S LIFE IS THE SAME AS THE ENGINE'S AND IS MAINTENANCE
FREE.
- Check the axial clearance on the connecting rod.
Fitting clearance
Standard connecting rod axial clearance 0.15 ÷
0.30 mm Max. connecting rod clearance 0.5 mm
- Check the correct radial clearance of the con-
necting rod by holding the driving shaft with your
hands and, with a dial gauge fitted to the rod small
end, measuring the clearance, move the connect-
ing rod vertically as shown in the figure.
Fitting clearance
Connecting rod radial - standard clearance
0.006 ÷ 0.018 mm Connecting rod max. - radial
clearance 0.25 mm
MSS ZIP 100 4T Engine
ENG - 107
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