Recent content by 313-Matt

  1. 3

    TCI Replacement 2020 It Works

    Sparks, ran, but from my 2020 post: "Bad bogging between 3-5k rpm under load and throttle. Once it gets to 5k it opens up." It seemed to work ok in the driveway with the timing meter on it, but wouldn't work on the road. I swapped the pickup leads and it went to kickback. Kick-back so bad I was...
  2. 3

    Arduino TCI

    @sleddog83 I really think an arduino is a great idea to replace the stock ignition box. I fooled with it a bit in 2020, but never got a circuit that I was happy with. The short version is that my EE isn't strong enough to build a curcuit that could collapse the coil and be reliable. Then I was...
  3. 3

    TCI Replacement 2020 It Works

    So I decided to run the module tests I found in a GN250 manual on the module today. (Page below. Yeah, it's hard to read.) Every resistance (except open circuit) test came up bad. One interesting thing did happen. When I applied power to (2) and ground to (6,) 4 went to ground. Not sure what...
  4. 3

    TCI Replacement 2020 It Works

    Yeah, Michael Morse (UMMM) recommends that as well. It was 'on the list' of things to do when the (stock) module had problems. Matt
  5. 3

    TCI Replacement 2020 It Works

    So I am concerned about how this box is working with the XS. I found a GN250 manual online and they list the timing advance as 10/35 degrees. So if the box isn't giving the 10/35, something else is going on. I am not sure what, but will continue to peruse the manual and give it some cranium...
  6. 3

    TCI Replacement 2020 It Works

    Well, I got the wires switched, and it seems different. One thing is now I have a kick-back problem. Almost to the point I am concerned about kicking it. The other is that it is really advanced. Here is idle: (looks right to me) Here is 4 or 5k: What am I doing wrong? Matt PS - My son says...
  7. 3

    TCI Replacement 2020 It Works

    So I got the airboxes on and was able to take a short ride today. It runs, but not quite right. Bad bogging between 3-5k rpm under load and throttle. Once it gets to 5k it opens up. My son asked: "How much of the time are you between 3 and 5k when riding?" Almost all the time, buddy. :-/ The...
  8. 3

    TCI Replacement 2020 It Works

    So I have some preliminary success with the GN250 module for my 81. Wired exactly as Jim shows (above.) Starts and Idles. Timing exactly on the idle mark. So far so good. I am jetted for my exhaust and K&N filters in stock airboxes. I haven't mounted the module yet, so was running with the bare...
  9. 3

    TCI Replacement 2020 It Works

    I'm sure it's covered elsewhere, but Heiden Tuning in Germany found probably the easiest plug-in* HP gain was NGK Iridium Spark Plug BPR7EIX plugs. ~2HP gain proven on the dyno...
  10. 3

    TCI Replacement 2020 It Works

    GN250 box arrived today. (Goodness gracious Amazon is fast.) It appears that this one is "floating." Thanks for the wire direction, Jim.
  11. 3

    TCI Replacement 2020 It Works

    Any recommendation on pigtail gauge needed? It's short, and I think I read in here that the coil needs 1A, so 18 should be enough? Or should I use the stock? I haven't measured it, but that appears to be in the 14/16 range. TIA -Matt
  12. 3

    TCI Replacement 2020 It Works

    Hey, everybody. First time poster. Wasn't aware you guys were out here. Anyway, I have a dead box on my '81. (Two now, actually.) I ordered a cheap GN250 box and will wire up a pigtail this week. Jumping on the Gonzo bandwagon! Thanks for all the hard work, guys. -Matt
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