1982 1100 Ignition Box

[Dan Bailey]

Does anyone know if the ignition box out of a 1978 1100 will work in my 1982 1100 maxium ?

[JWSanders]

I'm fairly sure it wont work. The '82 TCI module is different in that it compensates for the lack of a vaccuum advance in that model. Will take the same year to replace it. That was the first year they changed it. Sorry...

[randy]

Actually the first year they changed it was '81.

[JWSanders]

Oops, my bad.

[Dan Bailey]

Thanks for your help JW, I been having a hard time finding the exact replacement for my bike

[Dan Bailey]

Randy,

It seems like I heard that you rebuild Ignition boxes, is this true ?

[randy]

This is true. However, time is precious for me these days, so don't expect a quick turn-around. You might not get it back until mid-June. If that works for you, PM me.

[desert1]

Australia

A company in Oz makes an aftermarket unit for about $200. US for the XJ it has a guarantee....dont have the website sorry.
Bruce
78XS1100

[desert1]

XJ

By the way a 78E unit will not work in the Maxim, know that, I tried in a friends bike...
Bruce

[Jerry]

By '81 Yamaha had gone away from the mechanical vacuum advance to an elelctronic system with the advance curve programed into the 'black box" or TCI module. The '81 and '82 versions are different, and the engines don't run well if you swap between these years. Vacuum advance is simulated by a 'boost module' that feeds another input into the TCI, so the '81, '82 models have a vacuum line used for ignition timing connected to the inlet manifold. Hint: Make sure the vacuum lines are good! Replace as needed, or your timing curve will be all out of whack. (Vacuum to boost module, timing signal from boost module to TCI provides the advance value.)

The '82 unit has a different timing curve, max advance comes in at a higher RPM and initial advance is different.

The after-market unit is usually seen on eBay for around $135.00 US dollars. The maker claims to use a differnt curve (used on Yamaha race bikes) than OEM, resulting in more HP.

The XJ part has a number that begins with 10M. If you are looking for a replacement XJ TCI, use only a 10M version or go to the after market unit, but specify it is for an XJ, not an XS so you get the correct unit.

The later XS / XJ engines have a lower compression ratio, different cam profiles, and even different valve sizes than the original '78 and (I think) '79 engines. The XJ engine added the YICS (Yamaha Induction Control System) which is a balanced vacuum port built into the head. (Special tool required to synch carbs, BTW.) For all of these reasons the XJ ignition curve is unique, and the TCI boxes from other 11s won't work or work well on it.

Some day I'm going to fit my XJ with early cams and the after-market TCI and see how well it works....

[desert1]

Hey Jerry

Xcellent reply Jerry!
Bruce

[Dan Bailey]

Thanks for every one's help !! I learned a lot about these units, now I just need to find a replacement 10M so I can enjoy the Summer on my new bike, if anyone has one to sell let me know.
Thanks again.

Dan Bailey
920 427-3016

[John]

The 10m box is very hard to find. If push comes to shove, you could adapt a complete older XS system onto the XJ. It can be done. The pickup coils, and advance mechanism will bolt right up. You'll need to figure out the wiring. I had an XJ engine in my 80G for years, and I wanted to upgrade the ignition system on the XS, to that of an XJ, but I didn't have a wiring schematic to do the rewire work, and I didn't feel like cutting into the harness to figure out the wiring, so I just put the XS parts on the XJ motor.

[TopCatGr58]

Hey Dan,

You might find it easier to get the older TCI, the 2H7 unit, AND the centrifugal and vacuum advance modules that attach to the crank under the timing cover plate. Randy has limited ability with repairing the later TCI's, IF the IC's are fried he can't fix them, can't get the info from Yamaha, or program any replacements!?

He can fully repair the older 2H7 units, but you can also make your own controller from GM ignition parts, again using the older advance units, there was a recent thread about making your own TCI module.

Otherwise, good luck finding a 10M unit! They are discontinued from Yamaha
T.C.

[T748]

Dan,
I have an ignition box if you still need one. The ignition box says 10M-10 Type TID14-10. -Tom.