More SOBoxer problems

Discussion in 'Classic Motorbikes' started by SteveH, Jul 9, 2010.

  1. SteveH

    SteveH Guest

    Got the bike running and dragged it out to take it to London for a
    meeting, but it stalled on the drive and wouldn't re-start.

    The previous afternoon, after replacing the starter, everything was
    fine, managed to get it warmed up and got it settled into an idle at
    around 1k rpm.

    I thought I'd flooded it, so left it for a while and pulled the plugs
    whilst I waited for it to 'dry'. Plugs were black, even though they're

    Cleaned the plugs, put them back in, and it still wouldn't start - I've
    gone back to look at the idle richness setting and wound it back to the
    recommended settings.

    Took the car to the meeting, came back today, and tried to fire it up.

    It's turning over fine, and I appear to have a spark.

    It's definitely getting fuel.

    Any ideas, as I'm running out of them now..... short of a match in the
    petrol tank.
    SteveH, Jul 9, 2010
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  2. SteveH

    Krusty Guest

    Dunno, but when it's fixed, stick the heap of shit on ebay & get
    something more reliable like a BSA or James.
    Krusty, Jul 9, 2010
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  3. SteveH

    SteveH Guest

    I'm definitely leaning towards eBay with this one.

    It's the first shitter I've bought in years - even though I took the
    precaution of buying from someone who appears to be a fairly well known
    specialist in old BMWs.
    SteveH, Jul 9, 2010
  4. SteveH

    SteveH Guest

    And it was the coil pack.

    Now replaced and working.

    SteveH, Jul 10, 2010
  5. SteveH

    Krusty Guest

    Can't wait to hear what tomorrow's failure mode will be.
    Krusty, Jul 10, 2010
  6. SteveH

    SteveH Guest

    Heh. I'm kind of hoping this'll be the end of it.

    It seems that the day I took it into The City fried all the electrics -
    temperature that day was into the 30s in London and traffic was
    incredibly heavy, plus I had the side cases on, so I was going very

    With hindsight, I probably should have stopped to let it cool for a

    Anyway, the coil pack on it now is the new 'black' coil, which is
    supposedly much improved over the old ones, and the new Valeo starter
    has definitely perked up the starting process.

    Fingers crossed it'll be OK now - I'll give it a short run this
    afternoon to fine tune the carb settings and take it for a longer run
    SteveH, Jul 10, 2010
  7. SteveH

    Krusty Guest

    And to think people slag off Italian electrics. I've spent hours
    crawling around Barcelona, Monte Carlo & Lake Maggiore in the high
    30s/low 40s on the MV, with the fan running constantly, & nothing's
    ever stopped working. Who'd have thought an MV would be a better, more
    reliable touring bike than a BMW!
    Krusty, Jul 10, 2010
  8. SteveH

    SteveH Guest

    Over the years (mostly with cars), it has generally been German
    electrical components which have given me the biggest issues.
    SteveH, Jul 10, 2010
  9. SteveH

    Pete Fisher Guest

    Makes sense of a kind that bikes built in southern Europe should
    withstand summer heat whilst those whose natural environment may include
    the cold and wet of the Eifel mountains in winter can cope with that.
    When the situation is reversed, however, weaknesses may become apparent.

    TBF though, age of components also has to be a factor. Certainly seems
    to be a limit on the life of CDI stator ignition windings on SO Italian
    bikes which usually manifests itself when hot.

    | Pete Fisher at Home: |
    | Voxan Roadster Yamaha WR250Z/Supermoto "Old Gimmer's Hillclimber" |
    | Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
    Pete Fisher, Jul 10, 2010
  10. SteveH

    Hog Guest

    It's bog all to do with temp. The OE coils were faulty. It pays to replace
    them at the outset.
    Just like the mechanical regulator should be replaced with the high output
    solid state unit.

    Though I now have the nice combined regulator/rectifier upgrade.
    Hog, Jul 11, 2010
  11. SteveH

    Buzby Guest

    I've had both. I think you need help.
    Buzby, Jul 12, 2010
  12. SteveH

    Jeweller Guest


    Aprilia Pegaso 650 IE "The Flying Mythos"
    Formerly: James Captain, A10, C15, B25, Dnepr M16 solo, R80/7, R100RT
    Jeweller, Jul 12, 2010
  13. <Studies fingernails>

    So the BMW is up for grabs?
    The Older Gentleman, Jul 13, 2010
  14. SteveH

    Steve H Guest

    Possibly.... But there again, probably not for the money you'll want to
    Steve H, Jul 13, 2010
  15. Hmmmmm.....
    [email protected], Jul 14, 2010
  16. SteveH

    SteveH Guest


    It's a 1983K, 59k miles, 7 month MOT.

    Lots of life left in the tyres, BMW panniers and I'll include the
    stainless Keihan cans.

    How much is it worth to you?
    SteveH, Jul 14, 2010
  17. SteveH

    Hog Guest

    Can I just point out that your problems were probably raised by the faulty
    coils. A well known issue. You have replaced the coil and the other bits.
    Also given it a new starter motor. It should run for 100's of thousands of
    trouble free miles now and is a fantastic bike to own. Selling it *now* is a
    bit silly. Actually very silly, if the reason is "it's unreliable".
    Hog, Jul 14, 2010
  18. SteveH

    SteveH Guest

    It has just pissed me off with all the cocking about and the fact that
    it let me down at a very bad time, making me late for a meeting, that
    just makes me not particularly enthusiastic about it anymore.

    If the money is right I'll seriously think about letting it go, if not
    it's going up the lockup so I don't have to look at it every time I
    open the garage.
    SteveH, Jul 14, 2010
  19. Hm. £1500? Fancy a K11LT?
    [email protected], Jul 14, 2010
  20. SteveH

    Hog Guest

    That he couldn't easily fix himself. Ha.

    The RT would be nice in Chile.
    Hog, Jul 14, 2010
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