Back on an Airhead - 1975 BMW R90/6

Discussion in 'Airheads' started by tete, Aug 27, 2012.

  1. tete

    tete clown shoes

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    Oddometer:
    346
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    I went ahead and reset the timing. Spot on now. Now I need to do another valve adjustment just to get her a bit more dialed in.

    As for shutting it down I still have not addressed that. But hope to this week. I did look it over and can't see an area in which I screwed up. Maybe because its connected directly to the battery? But that's how the instructions suggested to do it. I mean, the battery is always on lol. So that's the only thing that makes sense.
  2. tete

    tete clown shoes

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    Ok so on the back if the intructions there was a note: it states -"we have found that some pre-1979 models, when fitted with the ignition, fail to stop running when the kill switch it operated. This is due to the very small current required to keep the electronics running. To overcome this problem you can operate the brake light or rewire the system to take all its power from the standard ignition wiring.

    To do this the red wire and fuse are totally disconnected and removed. The green wires are both joined to the +15 of the left hand coil. The male terminal on the ignition box will require changing to female. "

    I can certify my self as a dumbass.

    This all makes perfect sense. Maybe I should read ALL the instructions next time.
  3. tete

    tete clown shoes

    Joined:
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    OK with the Boyer now wired correctly and the timing set the bike , runs, idles, stop, starts, as it should very smooth and extremely happy. I don't knw if I'm in too deep or not, I mean, i got it for 1300 I probably put $400 into it. and it seems to be a good running bike. $200 for boyer ,$200 , oil filer, airfilter, carb rebuild kits, and a few other bits here and there.

    Here is the to do list:

    install oil pan gasket, change oil again and replace filter again.

    Install throttle cable, clutch cable, and some other cable - rear drum?

    Lube splines and add oil for transmission? drain and fill i guess?

    Remove front wheel, paint front and rear, add new tires - Rear as well.

    Need to flush out old brake fluid for new. Any recommendations?

    install acewell.

    paint tanks

    finish re-upholstery on the seat

    So even though it took me 18 pages to get to this point I am far from finished.

    The good thing is I have most of the parts needed sitting in front of me. Just need to get back at it.

    all the above plus a proper cleaning. more pics to come.

    Thanks again guys for getting me this far.
  4. disston

    disston ShadeTreeExpert

    Joined:
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    12,321
    Location:
    Silver Spring, Md
    "Need to flush out old brake fluid for new. Any recommendations? " Tete said.

    BMW specifies type 4 brake fluid. In an emergency you can use type 3 it is compatible with 4. It is a pretty straight forward job. One person can do it usually on these bikes. Crack the bleed nipple on the caliper and give a few squeezes of the brake lever. Close nipple and add brake fluid to Master Cylinder. Keep this up until the fluid coming out of the caliper is all new fluid then do it for a little longer to make sure then wrap it up. Wash all spilt brake fluid off with soapy water and rinse well, brake fluid is water soluble. If any brake fluid gets on painted surface while you are doing this rinse it off immediately. Brake fluid will eat paint, and some other things, usually plastic things. It doesn't hurt metals much but could discolor Aluminum I guess.

    One point to remember is to not let all the fluid be pumped out of the MC at any time. If the MC runs dry there can be air introduced and you don't want that to happen. Make sure you add fresh fluid before the MC is too low.
  5. Kt-88

    Kt-88 I like everything.

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    Two throttles and a clutch, then a cable to go from front brake to mc?
  6. tete

    tete clown shoes

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    Got most of the paint off. I'm not going to paint the tank. Just going for that patina look. The tank will have more character than in this pic. But for now. ....
    [​IMG]

    I'm going for that raw look. Black fenders. Black wheels. Etc.
  7. Kai Ju

    Kai Ju Long timer

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    Long Beach, California
    You need to at least clear coat, or rub oil on the tank to keep it from rusting.
  8. tete

    tete clown shoes

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    Yea will do. If I do oil what kind? And if I do oil today can I clear coat over the oil later?
  9. rufusswan

    rufusswan Been here awhile

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    I'm considering the same with a tank, and the simplist thing seems to be to polish the bare metal as much as you want then just clear coat the darn thing.
  10. tete

    tete clown shoes

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    Yeah clear is what I wa thinking but oil might tint the metal a bit making it look a bit more rustic
    [​IMG]
    I'm pretty happy with where I'm at. This is just a mock up to get me excited,It's not perfect and that's the way I wanted it. I don't want it to look like I was lazy either. It has A few small specks here and there from the previous paint but I think it adds to the story a bit. I plan on painting the canal / part that goes over the frame black.

    Got these Magura grips as well
    [​IMG]
    Things are coming along. Gotta get the fenders off now and start primer there. Gonna go black on those. I'm debating about doing the rear or eliminating it with boxer metals block off fender plates. But then I gotta figure out the tail light. Ungh. @bmweuro do you have a pic of a bike w the fender plates instead of a fender?
  11. tete

    tete clown shoes

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    Just finished putting the seat cover on. I used basic trim to hold it on. It not perfect but I would say pretty damn good considering its my first go.
    [​IMG]
  12. Kt-88

    Kt-88 I like everything.

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    Lookin good!
  13. jocce

    jocce Adventurer

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    Looks perfekt to me, where did you get the cover ?
    Love the bare tank by the way.
  14. tete

    tete clown shoes

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    Got it from motobins UK. Great cover but a couple things to note. I ordered 2 of them one fro a /6 and one for a /7 and neither of them have the BMW painted on the tail end. Also they ended up being fairly in-expensive until you add shipping. Shipping was like 30$ or something. Si I guess you end up paying about $50 for one. I still have a /7 cover an seat for anyone that is interested.
  15. 53dodgekustom

    53dodgekustom Been here awhile

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    Waterloo, IL
    A lot of people in the hotrodding world with full bare metal cars use gibbs penetrant to coat it with. Won't rust or collect dirt and you cant tell it's on there.

    http://www.roadsters.com/gibbs/
  16. tete

    tete clown shoes

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    Found a local guy that's a distributer. Ill pic some up this week. Sounds perfect.

    Also ordered my tach.

    [​IMG]

    Prepping to paint. Black of course.

    I'm not sure about using the s fairing yet but if I decide to sell it, it will be ready to go. I have the gauges and mounting hardware. Just need the windshield part, if anyone knows where I can score one that would be helpful.
  17. hwy61

    hwy61 Been here awhile

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    You can try... http://www.bikescreen.com I think they'll have what you need for a screen. If you do decide to sell the fairing give a shout...:D
  18. tete

    tete clown shoes

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    Quick poll. Should I paint the tank black or not?[​IMG]
  19. Kt-88

    Kt-88 I like everything.

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    No
  20. R100LT

    R100LT Chasing 11

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    Is there any other colour for an Airhead ???