85' 1100 hanging idle

[Bones]

The later model FJ's in Australia don't have that vacumn line Pat, I know my 93 hasn't got it, must be an Americian emissions thing.

[Pat Conlon]

Interesting, yet another difference with the AU vs US bikes.

Do you know if the early FJ's (84-87) sold in Austrailia have the vacuum line to the ignition box?

[oldktmdude]

Yea Pete, I hear ya, TCI, DCI, CDI, whatever... my point was the vacuum line on the '89 does not run to the ignition box like the earlier FJ's.

Pat, does this set up on the later models, perform the same job as on the earlier models? Just curious. Mine has been disconnected for a couple of years
with absolutely no indication of it being so.
   Regards, Pete.

[Pat Conlon]

Pete, yep, it's an emissions feature, nothing to do with performance.

Throttle plates open = low vacuum = no advance.
Throttle plates close = high vacuum = ignition advanced

This is the early 84/85 FJ1100 timing curve posted just to show the example....I'll try and find a late FJ1200 timing curve.


I've had mine disconnected for years, no problem at all, I don't miss it..
One thing I did notice, when I had the vacuum advance connected and I would snap close the throttle, my bike felt like it wanted to speed up, that was the advance happening. Now, with it disconnected, my bike slows down on the engine compression, as it normally should.

RPM Randy mentioned several years ago that the Legend/T-Roadster racers purposely disconnect the vacuum advance just for this reason.
When rolling off the throttle setting up for a corner, they wanted their race cars to slow down, not speed up.

[aj52]

Interesting, yet another difference with the AU vs US bikes.

Do you know if the early FJ's (84-87) sold in Austrailia have the vacuum line to the ignition box?

Pat

The JDM FJ's does not have it either.
But,with the carbs we saw there are quite a lot of differences

Hannes

[Pat Conlon]

Good to know, thanks Hannes!

Speaking of JDM and the power restricted FJ's (like the Swiss bikes) what I noticed was a different, less aggressive ignition timing curve on the power restricted models.
iIRC it actually had a dip programmed in the timing at ~6k rpm.
This was, of course, built into the TCI/DCI ignition box, so the only way to defeat it was to get an ignition box off of an unrestricted FJ.

We ought to compile a list for the Files noting all the differences in our FJ's sold thru out the world.
Like, in Austrailia, the FJ's did not have the side stand switch, the JDM/AU bikes have no vacuum advance, all the crap the JDM/Swiss/French bikes have for power and speed restriction, all the other FJ's except the USA bikes, get the 'flash to pass' headlight switch.....things like that...

All this stuff gets confusing (to me) to remember.
If we write it down and have it in the Files, it will be easy to look up in the future.