Nirvana TOP 80, Assembly And Maintenance Manual

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last update 23.10.2012
CARBURETTOR DIAPHRAGM
To work correctly the carburettor diaphragms should be maintained in a
sealed wet state. After numerous hours of operation of or where it is
believed that the diaphragms have been in a dry carburretor a substantial
period – it is recommended that a diaphragm repair kit M10V5 or full kit
M10V5K be installed to ensure optimum performance. Contact your dealer if
in doubt. After long period of inactivity it is possible that the diaphragm has
dried out due to fuel evaporation, this in itself is enough reason alone to
change the diaphragms.
The replacement of the diaphragm is recommended annually. As with all
things - they wear. Associated with wear of the diaphragm is a decrease in
pump performance, which is turn effects fuel mixture ratio. The failure to
replace the diaphragm will cause a degrading of pump performance, and a
leaning out of the mixture ratio, resulting in possible engine seizure.
Changes to the mixture setting may also be necessary due to season changes
/ altitude variation (+ -500 m from previous location). This may be performed
by persons comfortable with the function of the engines operation or
alternatively by you dealer.