MH RYZ 50 Cross C, Service Manual

Page: 59 / 92

RYZ
ENGINE 5-21
Insert the support tool supplied with the plate on the stud
Special tool (E)
Special tool (F)
Centre the assembly on the crankcase with the four bolts. (5).
Fit the centring tool on the support tool.
Special tool (K)
Screw the stud nut down until the crankcases close completely
with the screw-plate (1).
Fit and tighten the thirteen securing bolts.
Securing tightness torque:
1,1 daN·m (11 N·m)
N.B.:
Check that the crankshaft-connecting rod turns freely insi-
de the crankcases.
Fit the gear lever without tightening it. Turn the primary drive
shaft manually and check that the gears turn smoothly.
Lubricate the crankshaft-connecting rod and the bearings lightly
with 2-stroke oil.
CHECKING THE PISTON
The pistol should not show signs of scratching or seizing.
The piston rings must move freely in their grooves.
CHECKING THE PISTON RINGS
Remove the piston rings carefully.
Fit one ring inside the cylinder bore parallel to the bore, and
with a feeler gauge, measure the ring gap clearance
Piston ring gap clearance: from 0.15 mm to 0.30 mm
Limit of use: 1 mm
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