Chapter 7 – Cylinder head and valves
Manual de Oficina AJP PR3/PR4 (2015) 7 - 12
Assemble the flywheel on the crankshaft and
tighten to the specified torque to the
respective screw whether it M8 or M10.
Assemble the double gear reduction starter
with the respective washers.
Then put the guide bearings and gasket and
lock the cover with the stator on the
crankcase.
Install the screws in the correct position,
taking into account their different lengths.
Tightening torques:
Screws of the left crankcase: 12N.m
(1,2kgf.m)
Screw of the flywheel (M8): 26N.m
(2,7kgf.m)
Screw of the flywheel (M10): 39N.m
(4,0kgf.m)
Stator screws: 10N.m (1,0Kgf.m)
Pulse generator bolts: 5N.m (0,5Kgf.m)
CYLINDER HEAD INSTALLATION
Assemble the two guide bushings (10x20) and
install the cylinder head gasket on the
cylinder, in the case of motor 125 / 150cc
there are three guide bushings.
Note:
In the engines 125 / 150cc not forget to
mount an O-ring (10x1,6) on the bushing
guide to seal the oil passage hole in the
cylinder pin / head back right cylinder.
Before proceeding with the installation of the
cylinder head to the engine, it is important to
check the correct tightening of the four
cylinder bolts in crankcases, using two nuts
M8 (nut and counter nut). The correct
tightening should be
29N.m (3,0Kgf.m)
.