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My 1991 907IE is in need of a new RPM sensor which is referred to in the Parts Book as a "Proximity Switch", part #55240051A. I would like to buy a new one if possible and would appreciate any leads for dealers, etc. that might have one. I'm told that this part may also have been used on the 851 or other model of this era so it may not be totally unique to the 907. I would also consider buying a serviceable used one if need be. Replies can be sent to me directly at dan@dgwines.com. Thanks and Happy Holidays.

Maybe one from the models w same flywheel & similar ECU works, 851/888, 916 Bip/SPS etc?
Worth checking.

Could work:
http://www.gothamcycles.com/servlet/the ... ors/Detail

these prox switches are very common on any Weber Marelli P7 / P8 EFI ignition system ...and similar on many others, too.

the 851 is same for sure; also cagiva elefant

common European auto Alternatives / part no.s
Facet 9.0001
HC Cargo 150330
Hella 6PU009163171
Lucas SEB144
Marelli SEN8E
64820084
Meat-Doria 87005

OEM / Wholesale Alfa Romeo 60512971
60572239
Bresch SEN8E
Fiat 5944390
7604582
Intermotor 18750
Webcon WSS001
WSS073


hope this helps...

all details stolen from http://www.endless-horizons.net/efi/efi.htm

Thankyou both for your helpful tips and encouragement. I will check out the leads that were provided soon and get my bike back on the road where it belongs.

Where are you?
Any good shop of Italian cars spare parts can supply it.
Ciao