The dreaded blue smoke

Discussion in 'Airheads' started by motog, Dec 30, 2012.

  1. disston

    disston ShadeTreeExpert

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    I think he is referring to the break in procedure for a new bike that is mentioned in the BMW owner's manual or rider's manual.
    #41
  2. chasbmw

    chasbmw Long timer

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    The break in price endure in the manual is for all the wearing surfaces in the bike, from gearbox to camshaft, remember that the only new surfaces that need to be broken in are the rings and the piston pins. Your break in should be making sure that the rings seat properly.

    There can be some discussion as how to do that
    #42
  3. motog

    motog Been here awhile

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    I'm all ears.

    Always willing to learn
    #43
  4. chasbmw

    chasbmw Long timer

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    I'm sure SS will tell us how to do it.
    #44
  5. Airhead Wrangler

    Airhead Wrangler Long timer

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    I'm a firm believer in not revving it too high for the first 1000 or so, but still loading the engine hard in both directions. Let it brake hard down hills and give it plenty of gas going up them. Vary the RPMs plenty and don't spend a long time idling the thing when you fire it up the first time. Give the carbs a rough setting so that it'll run and immediately hop on and load the engine.
    #45
  6. motog

    motog Been here awhile

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    Ok, so now done about 200miles. All is going well except that I'm getting exceptionally bored staying below 4000rpm.
    Did the timing and tuned and balanced the carbs yesterday and have found that it starts a little bit easier - timing was advanced quite a lot which could explain some of the difficulty in starting.

    But it's still not starting very well so I've bought an overhaul kit for the Bosch starter from EuroMoto Electrics. Will put that in next weekend and see how that goes. If that doesn't fix it I'll probably buy one of the repro Valeo starters that EME sells as well as some better quality leads. Hopefully that will sort it out.
    #46
  7. chasbmw

    chasbmw Long timer

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    Hopefully the overhaul kit contains the metal bushes, in which the starter armature runs, when these get worn the armature cocks sideways under load and the starter runs very slowly consuming large amounts of battery power.

    If the repro Valeo is that same as the one in my 1070 bike, they seem to work fine.
    #47
  8. motog

    motog Been here awhile

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    Yep, got the bushes and the brushes. Here's a tip for anyone else doing this: don't buy it off the EME ebay site, the price is double what it is on their website.
    #48