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Bummer

Started by chiz, March 04, 2022, 09:30:09 AM

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chiz

Hi after completing maintenance .. brakes seals and polishing SS pipes I have discovered why the heat shield matting on belly fairing was soaked with oil. Oil leak at bottom right Allen plug and case half seam right side. Still going for a ride Sunday 13c supposedly. Chiz

Pat Conlon

Does that plug use a O ring? If so, a simple fix.....
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

RPM - Robert

There is an o-ring seal there Main oil galley o-ring but we have seen some of the plugs themselves crack. The plug itself is machined down very thin where the o-ring is, sometimes (usually from removal and then over tightening) the plug itself cracks. Main oil galley plug  

chiz

OK  No riding Sunday fed up the same #1 carb leaking from overflow... Oil gallery plug I guess had an '0' ring but it is now a very flat 'o' ring which made me think that maybe it was some sort of special one cleaned it up and slapped some permatex anaerobic purple stuff around it .... holding for now. Guess I need a valve and needle for #1 aaarrrg. Chiz

Motofun

For a bike that has been sitting a while (dried o-rings), dropped, or had the carb's removed......try the old screwdriver trick on a leaky overflow before you tear into it.  This has worked for me more times than I can count.  Use the plastic handle on a screwdriver as a "thumper" and TAP the offending carb bowl with authority.  Sometimes the float can get hung up and not seal the needle.  Knocking it loose does the trick. 
'75 Honda CB400F
'85 Yamaha RZ350
'85 Yamaha FJ1100
'89 Yamaha FJ1200
'09 Yamaha 125 Zuma
'09 Kawasaki KZ110 (grand kids)
'13 Suzuki GSXR 750 (track)
'14 Yamaha FZ-09
'23 Yamaha Tenere 7
SOLD: CBX,RZ500,Ninja 650,CB400F,V45 Sabre,CB700SC,R1

ribbert

Quote from: Motofun on March 06, 2022, 07:52:38 AM

 .... Sometimes the float can get hung up and not seal the needle.  Knocking it loose does the trick. 

You're right, and to this day I carry a foot long length of 1/4" steel rod in my top box for just that purpose, a carby tapper, it's just the right weight and the steel gives a sharper tap. I have also found a big rev, such as redlining it in first gear sometimes works as an immediate/temporary fix to stop the flooding.

But I have not used it for many years since getting rid of the engine vibrations and polishing out the indentations in the float tangs, and that was hundreds of thousands of km's ago. How many times do we read here of folks replacing needle and seats and still having intermittent flooding problems.










The above are the first four floats I randomly pulled out of a box of maybe 20! On earlier model bikes without the smooth motors, it's likely this wear is more pronounced.

You'll never find this in the files section so act now while it's fresh in your mind.

Noel

"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

ribbert

"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"

fj1289

Noel - I think you have the same issue I've had for a year or two now...

I'll draft it, it will show up on preview, but when I post, it doesn't show up.  So I modify the post and see a BUNCH of extra stuff fast been added to the image tags.   Once I delete that stuff out it is fine again 

chiz

Sure those little dents always trigger a little Hmmmm when I see them... interesting. I found a set of seats and needles in individual plastic pouches and installed one. Was not about to install all four(wrong) as the needle was ever so slightly longer and the spring seemed tougher so the float height was completely whacked compared to the rest I had just recently done... no leaks when set up on bench with new parts.
I have a few months as to what to do with this bike I have discovered that it leaks from base gasket and possibly case union the type of leak that on a car I would care less about but here it does get a bit messy over time. questions arise do I just fix the leaks or do other stuff. I now find it easy to live with the 2nd gear issue but there is still head valves bore pistons rings and(should replace while there other stuff). Stuck between rock and hard place because no one wants these bikes leak or no leak and I have a couple of others that I occasionally get domestic stick about.. Chiz