Check for correct Valve Clearance prior to any other
The carburetors must be adjusted to open and
close absolutely simultaneously.
Adjust as follows:
- Start the engine in order to reach proper
- Remove fuel lines and vacuum lines
from the fuel valves.
- Remove rear clamp fixing the fuel tank and take
off the fuel tank.
- Loosen the carburetor breather lines with the
small air filters (fig. 20
- Loosen the clamps on the carburetor ventilation
pipes with the small air filters.
- Remove the vacuum lines
from the intake manifolds and install the vacuum lines from your vacuum gauge to the
Note: The front cylinder intake manifold has
two vacuum lines coming out of it. Disconnect the smaller diameter line and leave the
larger on in place !
- Refit the fuel tank and the fuel and vacuum lines. Slightly rause the end of the tank so you will have access
to the fuel tank (adj. screw will be difficult to see better to fit longer fuel lines to
the tank, switch to PRI to be able to leave the fuel tank farther away).
- Restart the engine, which had prior reached
proper operating temperature.
- Compare the readings on both vacuum gauges
and adjust syncronisation screw until the readings match.
Place your bike on level ground.
- Fit a transparent fuel line with 6 mm inner
diameter to the carb drain port.
- In bending it upwrads, position the transparent
fuel line right next to the throttle stop screw (for idle speed adj.) as shown in fig. 198.
- Set fuel valve to the on"- position and
start the engine briefly.
- Stop the engine and check fuel level as shown in
- rear: 1.0mm ± 1mm
- front: 2.0 ± 1mm
- Adjust float bowl within the carburetor
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