Ignitor unit difference?

[Peder_y2k]

What's the difference, other than part number, between ignitor units for an '83 (part #26H-82305-10-00) and an '88 (part #41R-82305-11-00)?

I have an extra TCI for my '83 that I bring along JIC, and would like to apply it to my '88 for emergency purposes - like a dying TCI.

I'd like to avoid buying an extra for the '88.

-Pete, in Tacoma WA USA

'83,88

[Snaggletooth]

The '83 was different only as far as the timing response on it I belive. It still will run the bike fine and get you home, just not at the same preformance level as a 41R.

 

I swapped an '83, 26H to my '84 to try it and it worked fine for a backup.

 

For what you want to use it for you should be fine.

 

There was at one time a thread around here on the details of the difference.

[Peder_y2k]

Found the article (thread), and the diff seems to be the location of the pressure sensor port location.......above or below the carb throttle plate. As I understand it, the TCI is the same, but the signal for spark timing control is different. Somehow, it doesn't make sense, but really doesn't matter as long as a functional TCI (years 83-89) can be used as temporary substitute to get/limp home.

 

Here's the thread: http://www.venturerider.org/forum/showthread.php?t=50354

 

-Pete, in Tacoma WA USA

'83,88

Edited April 22, 2013 by Peder_y2k
spelling....bad laptop

[bongobobny]

It's actually quite simple. Where the vacuum is sampled is 180 degrees out of phase with where the vacuum is sampled for all other years. Therefore the vacuum advance is going to be backwards. As long as you are at idle or at a specific RPM and load the module will work, but as soon as you accelerate the advance will actually be retarding making it run like crap!

 

Also, there is a slight difference in the response curve for the '84/'85 and the '86 up due to the different motors but the difference is insufficient to really be noticed...

[Prairiehammer]

From 1990 on, there was only one pick-up. Wouldn't that preclude using an earlier TCI?

[muffinman]

From 1990 on, there was only one pick-up. Wouldn't that preclude using an earlier TCI?

Yes the 1990 to 1993 is more of a computer than a regular TCI and will not interchange the one I tried would not even let the bike produce spark

Jeff

[mbrood]

The boost sensor is the same throughout the years (83-89) but the timing curve in the TCI was a bit different for the 83 as discussed... but the older TCI units also had a weakness by using blue and gray, glass, power diodes that corrode the leads and lead to failure of an ignition coil, replacing these with 1N4000 series is a solid solution.

 

The old style diodes (8 total)

http://www.bergall.org/temp/venture/tci1.jpg

Edited April 22, 2013 by mbrood

[bongobobny]

From 1990 on, there was only one pick-up. Wouldn't that preclude using an earlier TCI?

Oops!! YUP!