Thread: 640 Fuel Pump
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Old 07-27-2006, 04:34 AM   #13
Carlos M
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Joined: Jun 2002
Location: Portugal, Europe
Oddometer: 3,409
Nice "creepinformation" (as ususal)!

I didn't want to be without a replacement and the original diaphragm looked worn. I ended up shelling out for a complete new pump as I couldn't find a rebuilding kit.

Somehow related... I have a recurrent problem with the fuel pump that looks unrelated to the state of the diaphragm: most of the times, when the bike goes into reserve (2001 640) the pump refuses to prime after I switch the fuel manifold into reserve. I found out that I can make it prime by blowing into the tank's breathing pipe.
Carlos M.
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