Black Box - Repair techniques?

[Shuriken]

I've soldered the black box a couple of times now to solve some ignition problems. Each time it works for awhile and then stops working again. I'm sure there is a lot to be said for technique and proper solder. But has anyone cut into the black box with a dremel to remove the circuit assembly for inspection / repair? Do the black boxes from different years swap? The one on my 80g says '77 xs1100 on the bottom of it already!

Anyone wanna chime in on the black box thread or is there another I should look at?

Thanks,
Ben

[fusionking]

Good guess

yea there have been some very lengthy disscussions on that very thing lately.

[jawnski]

You know Ben, sooner or later we all have issues with the black box. I had a problem last year. I found a solder joint that came undone so I soldered it. It ran fine for a year then I began to have the same problem- two cylinders not firing. I was ready to buy another on Ebay ($80) and then I let my electronics teacher take a look at it. He spotted the problem quickly, a bad solder job. He removed all the old solder and resoldered it the right way.

To answer your question, yes, soldering technique is key. In my case, it would run great and then cut out. Run and cut out.

I suggest finding someone who knows about soldering and have them help.

By the way, I was tempted to pull the black box apart too. I’m glad I didn’t.

http://jawnski.redirectme.net/yamaha/solderjob.htm

[Shuriken]

If I can figure out which pins to desolder, I'd like to take the whole thing out to re-do it. My brother has all the tools and the technique. I have a spare from another XS but I haven't checked the numbers.

Ben