CARBURETTOR
11
24
Components
1. Throttle valve
2. Impulse channel, from crankcase to
carburettor pump diaphragm
3. Screw for throttle wire play
4. Lever for throttle valve
5. Adjuster screw – high speed nozzle
6. Idling screw, speed adjustment
7. Measuring chamber cover
8. Pump unit cover
9. Channel for pressure equalisation of
the filter chamber (SmartCarb).
10. Choke butterfly
11. Lever for choke butterfly
12. Fuel connection
13. Measuring chamber – measuring
chamber diaphragm above
14. Needle valve
15. Pump diaphragm
– top side of the connection with the
crankcase via the impulse line
–
fuel under the diaphragm
16. Fuel pump valve tongues
Carburettor versions
The carburettor technology is being continuously developed and refined.
The carburettor version can be read from the marking as shown in the
illustration, for example, W69 950.
The components that are subject to service are usually identical from
version to version, such as needle valve, pump diaphragm, measurement
chamber diaphragm etc.
11
9
15
16
14
13
1
10
7
7
8
3
12
2
8
5
6
4
