Beta RR 125 LC - Page 39

CYLINDER AND PISTON
2. Install:
• Piston “1”
• Piston pin “2”
• Piston pin clips “3”
T
IP
• Apply engine oil to the piston pin.
• Make sure the punch mark “a” on the piston
points towards the exhaust side of the cylinder.
• Before installing the piston pin clips, cover the
crankcase opening with a clean rag to prevent
the clips from falling into the crankcase.
3. Lubricate:
• Piston
• Piston rings
• Cylinder
(with the recommended lubricant)
4. Offset:
• Piston ring end gaps
5. Install:
• Dowel pins
• Cylinder gasket
• Cylinder “1”
T
IP
• While compressing the piston rings with one
hand, install the cylinder with the other hand.
• Pass the timing chain and timing chain guide
(intake side) through the timing chain cavity.
Recommended lubricant
Engine oil
New
3
2
1
a
New
a. Top ring
b. Upper oil ring rail
c. Oil ring expander
d. Lower oil ring rail
e. 2nd ring
f. 20 mm (0.79 in)
A. Intake side
120
120 120
e
b
c
d
ff
a
A
New
1