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General Category => Yamaha FJ1100 / FJ1200 Running Problems => Topic started by: CanuckFJ on May 07, 2012, 08:34:52 AM

Title: Dead Diaphram?
Post by: CanuckFJ on May 07, 2012, 08:34:52 AM
OK, so here's the deal....... Bought the bike last year (86 fj12) I noticed a small 1/2' tall tube sticking out of the fuel cap.  The old owner said the diaphram was not working so there was no fuel getting to the carbs because there was no air getrting in the fuel tank so he put a "vent" on the gas cap. How hard to change the diaphram and is there 1 for each carb?  Got a new fuel cap to get rid of tubing.

Thanx
Canuckfj
Title: Re: Dead Diaphram?
Post by: mickarch on May 07, 2012, 11:36:04 AM
I think your problem is the flap in the gas cap vent, not carb diaphrams. Search the forum for "flapectomy", and read up.  Be careful not to lose the tiny spring and detent ball when you disassemble the cap.

mickey