N-Zeta 501/01, Workshop Manual

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All these jobs are done without removing the carburettor from the crankcase,
the carburettor being accessible after opening the side door. The main jet is also
accessible through the side door. To clean it, fine horse hair should be employed
and not a piece of wire or any other hard object. Removal of the jet will be described
for each carburettor separately. To clean the carburettor, it is necessary to first
remove it from the crankcase through the side door.
Jikov 2924 M 13 carburettor Fig.1
This model has been employed in the 501/01 and 501/03 scooter models. It is a
monoblock type carburettor. The main jet #19 is located in the float chamber. It is
accessible after removal of the float chamber top #20
To Dismantle The Float Chamber, Proceed As Follows:
Close the fuel tap first and remove the fuel supply pipe. After unscrewing the
four screws #32, remove the float chamber top together with the gasket #21 and float
#31. To assemble, proceed in the reverse manner.
The throttle valve needle #7 is located in the middle of the throttle valve #4
and is accessible after its removal from the mixing chamber after unscrewing the
mixing chamber top #8. After compressing the spring #5, free the control cable from
the throttle valve notches #4 and thereby the spring resting against the needle circlip
#6 and throttle valve. The circlip #6 secures the correct position of the needle #7. To
assemble, proceed in the reverse manner.