84 FJ1100 Dusted off After 10 yrs, Help

[Sparky84]

Urb, are you sure you were in 5th when you checked the revs? You wouldn't be the first.

One of our esteemed, long time owner and big mileage members rode a very long way in 4th on the open road once (not me)

Noel

Hey Noel - No. Pretty sure in 5th....used to riding a 6 speed bike and I keep looking for one more gear. But I have been known to be wrong before.

Mark (sorry if I am hijacking your thread Sparky)

Its useful info for me too,
I still keep going for 6th due (to what I feel) to be high revs for the speed

Last bike before FJ was a 81 Z1300 it was for memory felt like 2500 to 3000 rpm to 100kph in 5th, just ticking over

[Troyskie]

Hey Noel - No. Pretty sure in 5th....used to riding a 6 speed bike and I keep looking for one more gear. But I have been known to be wrong before.

Mark (sorry if I am hijacking your thread Sparky)
[/quote]
I've been trying to find that mystery 6th since 80's 

[Pat Conlon]

'84's are special emulsion tubes, aka needle jets, aka jet nozzles... The later model FJ carbs use different slides and those later model emulsion tubes will not work correctly with the slides on your '84 carbs.

If the holes in the base are not elongated (from needle wear) soak them in laquer thinner and clean and reuse them.

Randy at RPM may have a new set for you...they are getting hard to come by.

[Sparky84]

'84's are special emulsion tubes, aka needle jets, aka jet nozzles... The later model FJ carbs use different slides and those later model emulsion tubes will not work correctly with the slides on your '84 carbs.

If the holes in the base are not elongated (from needle wear) soak them in laquer thinner and clean and reuse them.

Randy at RPM may have a new set for you...they are getting hard to come by.

RPM have just been in touch and told me the same, but Nil stock at present
I didn't notice any major needle wear, I have made inquiries about a Keyster kit, whether they will fit or be a problem

[X-Ray]

I checked the new kit I recieved against the old parts, looks pretty spot on, although I haven't had time to do the rebuild yet. For an example of what I found when I pulled my carbs apart, have a look here (be afraid, be very afraid )

http://www.fjowners.com/index.php?topic=13236.0

[Pat Conlon]

I have made inquiries about a Keyster kit, whether they will fit or be a problem

Maybe you will get lucky with Keyster...but I doubt it.  Sure, they will tell you their tubes fit, but will they?

I went through this with Factory Pro here in the states. Factory Pro is the leader in carb tuning, none better.
They swore they were right. They referred me to the official Yamaha microfiche on line. I looked it up.

Sure enough, even Yamaha fucked up. They list the same emulsion tube for all FJ's. Wrong Wrong Wrong.

I'm here to tell you that Yamaha, Factory Pro, Dyno Jet, and very probably Keyster, are wrong. The vendors are wrong because they are relying on information from Yamaha...and Yamaha is wrong. ...shudder.

****The '84 FJ1100 carbs that have the flat bottom slides, use a different emulsion tube than later FJ carbs that have a curved bottom slides****

Listen to Randy. He is the only vendor who gets it.....

I still can't believe Yamaha got it wrong.... Look it up. You will see.

[Flynt]

****The '84 FJ1100 carbs that have the flat bottom slides, use a different emulsion tube than later FJ carbs that have a curved bottom slides****

I found out this is true last week...  decided the '84 needed to have clean carbs, so out to visit RPM.  My flat bottom slides were installed with the "shrouded" emulsion tubes that go with the newer curved bottom slides.  Robert pulls out 4 kits for the '84 and the e-tubes don't have the shroud...  they are very obviously different from the shrouded version (the "shroud" is what I'm calling the curved part of the e-tube that sticks up into the carb throat).

I haven't asked yet, but I suspect the PO (the CBX guru) ordered the replacement tubes from Yamaha and they sent the wrong version as Pat says.  The shrouded emulsion tubes worked fine with the early slides however...

Frank

[Sparky84]

****The '84 FJ1100 carbs that have the flat bottom slides, use a different emulsion tube than later FJ carbs that have a curved bottom slides****

I found out this is true last week...  decided the '84 needed to have clean carbs, so out to visit RPM.  My flat bottom slides were installed with the "shrouded" emulsion tubes that go with the newer curved bottom slides.  Robert pulls out 4 kits for the '84 and the e-tubes don't have the shroud...  they are very obviously different from the shrouded version (the "shroud" is what I'm calling the curved part of the e-tube that sticks up into the carb throat).

I haven't asked yet, but I suspect the PO (the CBX guru) ordered the replacement tubes from Yamaha and they sent the wrong version as Pat says.  The shrouded emulsion tubes worked fine with the early slides however...

Frank

Ah yes I can see that shroud in X-Ray's resto project.  http://www.fjowners.com/index.php?topic=13236.0

Compared to mine in photos above, 84 only projects into throttle body slightly, where shroud is the to direct airflow possible as to say

So that shroud is the only difference between 84 and other models?

[Sparky84]

I think the wait for these carb parts is going to kill me.
So this weekend I think carbs will get another full strip down and clean

All jets and passageways will be flushed no orifice will be left out

[Pat Conlon]

So that shroud is the only difference between 84 and other models?

If you are referring to the emulsion tube, yes. As far a I could tell, the tubes are the same with the exception of the shroud...No shroud '84/85..... Shroud's on '86-93 (curved slides from '86 on)

Along with different float needle seats on the gravity flow ('84-'87) vs. the fuel pump carbs ('89-93)
http://www.fjowners.com/index.php?topic=9836.0

I do have to respectfully disagree with my favorite sub Commander. Based on my experience, the emulsion tubes with shrouds on my '84 did not make my bike run right. Was it from the shrouds holding the flat bottom slides slightly more open? Dunno, that's my theory.
I know that when I cleaned and reinstalled my original etubes the bike idled better.

I have since replaced my original 30 year old carbs with the new rack of carbs (with curved slides) so the issue is moot for me.

[FJ_Hooligan]

They made the change to shrouded e-tubes some time during the '85 production run.  Mine were shrouded and the slides have more "cutaway" at the bottom.

I remember working on a friend's '85 and it had some really wonky DJ kit installed for the '84/early '85 models.  The needles were hugh blunt rods and the main jets were 185.  His FJ didn't run anywhere as good as mine.

[X-Ray]

Mmmm, just on the speed/rpm side of things , I just checked mine again on a ride. So 18/38 gives me --
100 kph = 3250 rpm
110 kph = 3500 rpm

[ribbert]

Mmmm, just on the speed/rpm side of things , I just checked mine again on a ride. So 18/38 gives me --
100 kph = 3250 rpm
110 kph = 3500 rpm

Ray, I've got 18/41. Since fitting the GPS HUD I no longer look at the speedo but at 105 kph true speed I'm hovering around 4000 rpm.  I like it because that's where the engine smooths out, I wouldn't want the revs any lower. Even that gearing has taken the edge off acceleration, I wouldn't want  to lose any more, which I know is entirely a personal choice. There is no right or wrong with gearing, just what suits your riding style.

Noel

[rlucas]

...another full strip down...
All passageways will be flushed no orifice will be left out...

Sounds like my last date.

[TexasDave]

...another full strip down...
All passageways will be flushed no orifice will be left out...

Sounds like my last date.