Removing the oil sump
- Remove the oil filler plug, the transmission cover,
the complete driving pulley assembly with belt and
the sprocket wheel, as described in the "Trans-
mission" chapter.
- Drain the oil as described previously.
- Remove the seven screws, shown in the dia-
gram, and the two rear brake fluid pipe fixing
brackets.
- Remove the screw, the by-pass piston, the gas-
ket and centring dowels shown in the figure.
Inspecting the by-pass valve
- Check the unloaded spring length.
- Check that the small piston is not scored.
- Ensure that it slides freely on the crankcase and that it guarantees a good seal.
- If not, eliminate any impurities or replace defective parts.
Characteristic
By-pass check up: Standard length
54.2 mm
Carnaby 125 - 200 Engine
ENG - 169
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