English –
39
Repair instructions
Connect the fuel hose to the carburettor. Check that
the hose is not twisted and is not too long so that it
gets trapped between the crankcase and tank. The
correct hose length between the tank and crankcase
is 43 mm (1.69 inches). The correct hose length
between the crankcase and carburettor is 53 mm
(2.09 inches) excluding the mitred section.
5
Connect the fuel hose to the carburettor.
6
Then refit:
• cable guide
• starter assembly (2.5–3 Nm)
• chain and guide bar
• clutch cover
• air filter
• cylinder cover
Fit the throttle pushrod in the tank and connect it to
the carburettor. Refit the spring.
4
Bolt the front vibration damping spring into posi-
tion, followed by both stops and the remaining two
vibration damping springs. Tighten to a torque of
2–3 Nm. Check that both vibration damping
springs and the stops are correctly seated on the
crankcase. Incorrect fitting may result in higher
vibration levels.
Connect pressure gauge 502 50 38-01 to the fuel
hose. Pump the pressure up to 50 kPa (0.5 bar).
The pressure should drop to 20 kPa (0.2 bar)
within 60 seconds.
2
Fuel tank – refitting
1
Insert the fuel hose into the carburettor chamber.
Refit the fuel tank.
2
3
Tank vent – testing
1
Use gauge 502 50 37-01 to measure vacuum.
Readings should be as follows: the vacuum
should increase from 30 to 15 within 30 seconds.
If readings are outside this range the vyon plugs
must be replaced.