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  1. Matt Rain
    Post

    Why did you buy an XJ?

    Four years ago, I wanted to get into motorcycling with very little disposable cash so I combed through the local classifieds - my two criterias...
    Post by: Matt Rain, Sep 27, 2017 in forum: XJ Technical Chat
  2. Matt Rain
    Post

    What did you do to your Yamaha today?

    Moved the oil cooler from my ‘85 XJ/FJ’s old engine over to my rebuilt ‘89 Radian engine. Curious to see the difference it’ll make - the new...
    Post by: Matt Rain, Sep 26, 2017 in forum: XJ Technical Chat
  3. Matt Rain
    Post

    Break-in oil?

    Interesting, thanks. This is being sold by a motorcycle-specific online shop, weird. Ima stay put and just refill her with Rotella at the next...
    Post by: Matt Rain, Sep 21, 2017 in forum: XJ Technical Chat
  4. Matt Rain
    Thread

    Break-in oil?

    So I've now put 200 miles or so on my rebuilt '89 Radian engine, taking care to vary RPM and avoid lugging the engine. While shopping for a new...
    Thread by: Matt Rain, Sep 20, 2017, 5 replies, in forum: XJ Technical Chat
  5. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    [IMG] What a machine. :cool:
    Post by: Matt Rain, Sep 9, 2017 in forum: XJ Technical Chat
  6. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    [MEDIA] BOOYA! I'll be back later with all the gruesome details, but suffice it to say that the "mechanic" I hired to swap the engine is off my...
    Post by: Matt Rain, Sep 8, 2017 in forum: XJ Technical Chat
  7. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Not much to report other than I'm waiting on parts. I'll have everything by the middle of next week. Oh - I'd emailed a couple of local salvage...
    Post by: Matt Rain, Aug 31, 2017 in forum: XJ Technical Chat
  8. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Scored a starter + bolts from the same guy - he didn't have it listed but I asked and he pulled the starter off the same bike. $65. Didn't do too...
    Post by: Matt Rain, Aug 26, 2017 in forum: XJ Technical Chat
  9. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Battery seems ok. It's an AGM and it read 11.83v after it cooled down. It took 11amps back in on the charger. But yeah, I need to source a...
    Post by: Matt Rain, Aug 26, 2017 in forum: XJ Technical Chat
  10. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Yes. TID14-79 3LT, which was only used for the 89 and 90 Radian with the single pickup coil. BTW I just got a new one this morning on eBay. Guy...
    Post by: Matt Rain, Aug 26, 2017 in forum: XJ Technical Chat
  11. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Just saw this. Good thinking. I'll take a look inside the cover. What do you mean by "connect to chassis"? A short?
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  12. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Out of curiosity, I opened up the cheap aftermarket starter solenoid - everything in there looks as good as new. The contacts were not welded...
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  13. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Pickup coil tested smack in the middle of that range - 99 ohms. TCI is original to the engine.
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  14. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Scratch that, I was looking at the wrong video on my computer. The Test 3 + Incident vid on my computer looks the same as it does on Youtube, with...
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  15. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Ha! You're right again. I just checked that vid and sparks are spaced the same despite the faster sound... and there doesn't seem to be a Youtube...
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  16. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Edit - see post #75. You're right, spark on plugs 3 & 4 is inconsistent when 1 & 2 are in the engine.
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  17. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    :p Glad I can give back to the community somehow. While in panic mode I briefly wondered whether this was the day I would end up on Liveleak.
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  18. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Vids of tests 1-3 and The Incident Test 1 [MEDIA] Test 2 [MEDIA] Test 3 & The Incident [MEDIA]
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  19. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Interesting. I briefly cranked the engine with all four plugs out and it cranked a lot faster than it did with two plugs in and two out.
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  20. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Oh man, eventful morning. Rooster53, to answer your previous questions: the battery has been charged very recently, and I always rotate between...
    Post by: Matt Rain, Aug 25, 2017 in forum: XJ Technical Chat
  21. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Bike refused to start with the scope hooked up. :( Then after I took it off, I tried firing up again and the first thing I got was a massive...
    Post by: Matt Rain, Aug 24, 2017 in forum: XJ Technical Chat
  22. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I merely used my iPhone's slo-mo feature. I would assume that the slo-mo part is played back at 0.25x - 120fps stretched out to 30fps. If I turn...
    Post by: Matt Rain, Aug 23, 2017 in forum: XJ Technical Chat
  23. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    New coils didn't change a thing. Still running only on 1 & 2 and the starter spins up. Next step is to integrate the Radian relays, which I'm...
    Post by: Matt Rain, Aug 23, 2017 in forum: XJ Technical Chat
  24. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Installed brand new 2.2-ohm coils today. Got one spark then nothing, most likely because of a bad crimped connection. Will solder and heatshrink...
    Post by: Matt Rain, Aug 22, 2017 in forum: XJ Technical Chat
  25. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I even have an extra set of FJ camshafts. One thing at a time though! Let's get her going on all four. That sounded wrong.
    Post by: Matt Rain, Aug 17, 2017 in forum: XJ Technical Chat
  26. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    It'd be interesting to get the bike on a dyno if and when I get it running properly. I know the 72hp (at the crank) FJ used to dyno in the mid-50s...
    Post by: Matt Rain, Aug 17, 2017 in forum: XJ Technical Chat
  27. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Official Yamaha specs claim 66hp for the Radian.
    Post by: Matt Rain, Aug 17, 2017 in forum: XJ Technical Chat
  28. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Yes, good site, that's where I found the much clearer YX600W wiring diagram (as an appendix to the earlier model's manual.) To think that I...
    Post by: Matt Rain, Aug 16, 2017 in forum: XJ Technical Chat
  29. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Thanks for all these leads, once again. Would make sense that the coil's inductance is a factor - probably even more so than the impedance?...
    Post by: Matt Rain, Aug 16, 2017 in forum: XJ Technical Chat
  30. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    And looking at the service manual for the PO's bike (Seca 550), the stock coils have a primary resistance of 2.5 ohms, which is less of a...
    Post by: Matt Rain, Aug 16, 2017 in forum: XJ Technical Chat
  31. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I noticed that as well but dismissed it as an error. Looking at the Clymer, it is saying the same thing. Hmmmm. Current coils measure 2.9 primary...
    Post by: Matt Rain, Aug 16, 2017 in forum: XJ Technical Chat
  32. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    [IMG]
    Post by: Matt Rain, Aug 11, 2017 in forum: XJ Technical Chat
  33. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Thanks Rooster53. Will try the scope once I get the Radian relay assembly. After comparing the FJ and YX wiring diagrams, it looks like the only...
    Post by: Matt Rain, Aug 11, 2017 in forum: XJ Technical Chat
  34. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Yes, yes, yes, no.
    Post by: Matt Rain, Aug 11, 2017 in forum: XJ Technical Chat
  35. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I think the TCI knows which coil to trigger because the magnets on the outside of the rotor are different sizes. I thought they might be reverse...
    Post by: Matt Rain, Aug 11, 2017 in forum: XJ Technical Chat
  36. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I do have a USB oscilloscope (I make electric guitar pickups as a side hustle.) What would I be scope-ing on the bike?
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  37. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Swapping the spark plug wires is one of the first things I've tried. No dice. I don't think all I'm seeing is the wasted spark. I made a short...
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  38. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    So valves are right on the money, as promised by the PO: I1 .004 E1 .006 I2 .005 E2 .006 I3 .004 E3 .007 I4 .004 E4 .006 Ever heard of a guy...
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  39. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    PO claimed to have adjusted them, but I shall abide by Rule #1 in post #5 and check myself. I have a bunch of extra shims in case I was lied to.
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  40. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    3 and 4 are indeed stone cold no matter how long I run the engine on 1 & 2. Using the choke has no effect other than intensifying the smell of...
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  41. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I just found a much clearer diagram that details the inner workings of that relay/diode combo (attached).
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  42. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Yup, with the YX having a bit more grunt lower the RPM range because of its distinct airbox/carb/exhaust configuration. So I just tried...
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  43. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    But the 32s are original to the FJ, and from my (admittedly limited) understanding the Radian engine is a virtual clone. My FJ is dead stock -...
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  44. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Ooooh. So you're saying that an energized relay OPENS the contacts? This is where I admit a sin. The PO mentioned tbat he needed to ground out...
    Post by: Matt Rain, Aug 10, 2017 in forum: XJ Technical Chat
  45. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    I wired the sidestand relay to the L/Y on the Radian TCI. I figured that when the sidestand relay is energized, it's the same as connecting the...
    Post by: Matt Rain, Aug 9, 2017 in forum: XJ Technical Chat
  46. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Wait, I found the part. What's described as a "diode" in the Haynes manual, Yamaha calls a "relay assembly", part number 2UJ-81950-00-00. We're...
    Post by: Matt Rain, Aug 9, 2017 in forum: XJ Technical Chat
  47. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    BTW here are both the '85 FJ and '89 Radian wiring schematics, should an amenable soul want to play along. FJ: http://i.imgur.com/SYk1xRz.jpg...
    Post by: Matt Rain, Aug 9, 2017 in forum: XJ Technical Chat
  48. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    As per my original post, I did modify the wiring harness to accommodate the different components and pinouts. The one area I have not touched is...
    Post by: Matt Rain, Aug 9, 2017 in forum: XJ Technical Chat
  49. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    Oh, another bit of info that is probably relevant - the '89 Radian uses a different diode block that has no Yamaha part number (!) The part...
    Post by: Matt Rain, Aug 9, 2017 in forum: XJ Technical Chat
  50. Matt Rain
    Post

    '89 Radian engine into an '85 XJ600/FJ600?

    So no markings on the rotor/flywheel. The TCI's Yamaha 3-letter model code (3LT) does match that of the engine case, so I got that going for me....
    Post by: Matt Rain, Aug 9, 2017 in forum: XJ Technical Chat
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