Bmw K100rs 16v problem !!

having problem with petrol pump not starting when engine turned
on,tested pump straight to battery working ok,hoping thats the way u
test it ,checked fuses, relays,bike turning fine no petrol,reaching
sparks,before i buy new pump does it seem its a wiring problem,or the
pump,clocks fine,battery fine ,earth cleaned checked,just happened
after a bout of backfiring the night before ,then pump wouldnt kick
in,is there anything else i should look for,not sidestand switch was
already disconnected,before i start to go in to the wiring loom,any
help would be grateful thanks
kevin BMW K100RS 16V 1991

 

Sounds like an earthing problem, or a dry joint within the ignition switch.

Boxer (Ex owner of a 1991 K1, 1986 K100RS & 1992 K1100RS) Current owner of
1993 K1100LT & 1986 K100RT

 

snip

have you checked the connector from the fuel pump / fuel guage sender. It
connects from the fuel tank (rear base) to the wiring harness on the left
hand side (under the side cover). The pins get loose in the connector over
time.

cheers,

Pegasus
93 K1100RS