Beta RR 125 LC User Manual

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

Beta RR 125 LC Specifications

General

Displacement	124.8 cc
Fuel System	Electronic Fuel Injection
Ignition	Electronic
Lubrication	Wet sump
Clutch	Wet multi-disc
Transmission	6-speed
Final Drive	Chain
Seat Height	920 mm
Fuel Tank Capacity	7.5 liters
Starting System	Electric
Front Suspension	Hydraulic fork with ø41 mm shaft
Front Brake	260 mm disc
Rear Brake	Single disc, 220 mm
Engine Type	Liquid-cooled, 4-stroke, single cylinder