Beta RR 390 User Manual

4
ADJUSTMENTS
64
GB
TENSIONING THE CHAIN
To ensure the drive chain a longer life, it is
advisable to periodically check its tension.
Always maintain the chain clean and
lubricated.
If the chain play exceeds 30÷35 mm,
tension the chain by following these steps.
•Loosen wheel spindle nut 1.
•Loosen counternuts A on either side of
the fork
•Turn adjusting screws B on either side until
the desired chain tension is obtained.
•Tighten counternuts A on either side of
the fork
•Tighten nut 1.
30÷35 mm
ADJUSTING THE HYDRAULIC
REBOUND DAMPER
Turn screw G to adjust the hydraulic re-
bound damper.
Turning the screw anticlockwise (out) de-
creases the damping effect.
Standard adjustment RR 2t:
18 clicks from the completely closed position
A
B
A
B
1
G

Beta RR 390 Specifications

General

Displacement	386 cc
Bore x Stroke	88 mm x 63.4 mm
Compression Ratio	12.5:1
Fuel System	Electronic Fuel Injection
Ignition	DC-CDI
Lubrication	Wet sump
Transmission	6-speed
Clutch	Wet multi-disc
Front Tire	90/90-21
Rear Tire	140/80-18
Ground Clearance	320 mm
Dry Weight	107 kg
Engine Type	Single cylinder, 4-stroke, liquid-cooled
Frame	Molybdenum steel with double cradle split above the exhaust port
Rear Suspension	Monoshock