Beta RR250 - Piston Cylinder Coupling Play; Checks and Exhaust Valve Unit Disassembly

3
94
2
1
5
4
3
ENGINE CHECKS AND ASSEMBLY
3.12.3 PISTON CYLINDER COU-
PLING PLAY
The following table sets out the coupling play be-
tween cylinder and piston. In order to calculate
the coupling play between cylinder and piston,
a subtraction must be carried out between the
diameter of the cylinder and that of the piston.
3.12.4 CHECKS AND EXHAUST
VALVE UNIT DISASSEMBLY
Remove the screws 1 to allow the disassembly of
the exhaust flange 2 and its gasket 3.
Displace-
ment [cm³]
Maximum
cylinder/
piston play
[mm]
Minimum
cylinder/
piston play
[mm]
250 - 300 0.1 0.035
Remove screw 4 fastening the valve control unit
to the booster; then remove screw 5 fixing the
bearings.