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1992 FJ1200 leaking fuel from carbs (pics included)

Started by MikeC149, August 20, 2022, 07:47:46 PM

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Pat Conlon

That fuel level looks to be a tad bit too high....
Here is what Monkey Mark is referring to....

1) Free Owners Manual download:
2) Don't store your FJ with E10 fuel
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire:
Fuel line:


Yeah I'd be inclined to agree with Pat here, the fuel level should be close(ish) to the bottom of the carb body/fuel bowl as illustrated earlier.  From that angle it looks like its above the intake boots.

Also putting my money of the needle/seat being too big.  Outside of that, if the seats are not fully seated or something is obstructing the full range of the float that could cause an issue also.  Is the fuel level the same across all 4 carbs?
89 FJ1200
Mikuni RS36, Hindle 4-1, Blue Dots


Quote from: FJmonkey on August 24, 2022, 01:16:56 PM
When you replaced the needle and seat for the floats, did you make sure they were for the 89+ carbs? The earlier gravity feed were larger and may not hold back the pressure from the pump.

That's a good point, I bought this bike used and the jet kit came with it. I'd have to ask the original owner. I decided to take the bike to the dealer.....I pushed the tangs down pretty far so the float level was far off and it finally stopped leaking, enough to ride it to the dealer.


Quote from: Pat Conlon on August 24, 2022, 02:56:44 PM
That fuel level looks to be a tad bit too high....
Here is what Monkey Mark is referring to....

At this point, I dropped it off at the dealer... They'll know exactly what it needs to run crisply. The kit (that I got from the seller) might have been meant for a gravity fed carb, I'm not sure.... The way it was puking fuel back towards carbs 1 and 2 was pretty disconcerting.