Sorting out my R90/6 (sprouty115)

Discussion in 'Airheads' started by sprouty115, Sep 13, 2017.

  1. WRC51

    WRC51 Long timer

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    Ha ha I have bought two pair of bars and neither is what I want. I have the US bars back on and they are really comfortable but as you said would not work with a fairing, I now have two new bars and cables to work with the lower setup, and of course new cables for the US bars...I am getting pretty good at changing bars and cables.
    sprouty115 and brittrunyon like this.
  2. sprouty115

    sprouty115 Long timer Supporter

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    Yup, and I have two more bars to try sitting on a shelf...
  3. sprouty115

    sprouty115 Long timer Supporter

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    Just finished changing the oil, which turned into quite the adventure: https://advrider.com/f/threads/r90-6-fork-drain-nut-torque.1386527/

    Now I'm in Atlanta for a weekend trip to see friends, but of course I can't help thinking about my bike - so while I'm away maybe someone can help me understand what is going on with my levers/controls - there are different shaped levers on my bike. I did replace the left side (clutch because the perch was broken), but both are suppose to be R90 levers, so...

    20190614_110137.jpg

    20190614_110126.jpg

    Can anyone tell.me which one was/is correct for my bike (mfg date of 9/75)?

    I know it's a small detail, but I would prefer they match. Also I have to decide what to do with the raw metal perch so before I put any time in that, I should get the correct lever(s).

    Edit to add - I also just remembered I may have the wrong grips on there as well...
  4. nobbylon

    nobbylon Long timer

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    Grips are correct, left lever looks correct.
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  5. Big Bamboo

    Big Bamboo Aircooled & Sunbaked Supporter

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    According to the fiche; the plain levers were used to 9/75, and the painted levers were used from 9/75... I've used rattle can epoxy paint on perches. Seems a bit more durable.
  6. sprouty115

    sprouty115 Long timer Supporter

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    So is painted the same as anodized? I may end up just matching the finish of the current lever to whatever matching shape lever I end up with.
  7. Big Bamboo

    Big Bamboo Aircooled & Sunbaked Supporter

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    No, it is not. It looks like the perches are not anodized, but the levers are. Anyone know for sure? I have a NOS /6 perch in my hand, and there are areas inside that didn't get any paint...
  8. nobbylon

    nobbylon Long timer

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    The right hand lever looks aftermarket. The blade should be more straight.
    Here’s my 75/6 with original levers.

    AFA98429-2AC1-40FB-9A0A-E6CB04F22476.png
  9. nobbylon

    nobbylon Long timer

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    Look under the lever and it should have the Magura emblem on it.

    5307499E-8CE2-40F3-8D16-1A548BF4D276.jpeg
  10. sprouty115

    sprouty115 Long timer Supporter

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    Ah! Will do.
  11. WRC51

    WRC51 Long timer

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    These are my 1976 (10/75) R90 controls that I believe are stock to the bike. The housings were painted black originally I repainted them black when I had them off. My levers look as though they were anodized black originally but it has worn but I can see traces of black on the levers and is now a silver shade .

    IMG_0866.JPG IMG_0867.JPG IMG_0870.JPG
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  12. sprouty115

    sprouty115 Long timer Supporter

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    So both levers are made by Magua.
    Brake:
    20190618_163250.jpg

    Clutch:
    20190618_163457.jpg

    Based on @nobbylon (matches my brake) and @WRC51's (matches my clutch) bikes it looks like both levers I have mounted are BMW but a change was made in '76.

    I also found the clutch lever that was originally mounted to the broken perch and it does match the other side:
    20190618_162957.jpg

    Obviously the next question might be - why not just mount the brake lever to the new perch. But it appears that there was a change to the pivot hole location, so it doesn't fit.

    Since that lever now seems like it was originally fitted to my bike, I went and found one on Ebay for a good price $34 and bought it.

    Screenshot_20190618-185456_Chrome.jpg

    And as I mentioned earlier, I know this is a small detail and may seem silly, but it matters to me...
  13. sprouty115

    sprouty115 Long timer Supporter

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    Perch arrived in great shape and with remarkably similar wear to the throttle-side. I had it on in about 45-minutes, 15 of which was me trying to get the grip off without ruining it. Which I did...
    20190620_121213.jpg

    Now I have a spare clutch perch with the dog-leg lever. It will just collect dust in my basement so I'll be posting it in the flea market soon, unless anyone here wants it? Does $20 (plus shipping) sound reasonable? Just PM me if you want it.

    NOTE - see that faint grey lines on the right hand edge of the perch assembly? The top one is a scratch and the one below that is a small crack. The crack doesn't seem to effect anything as it's certainly not structural. I'm sure it could be filled and painted.
    20190620_121245.jpg
    20190620_121322.jpg
  14. sprouty115

    sprouty115 Long timer Supporter

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    More stuff -

    Yesterday, before the perch showed up I decided I wanted to be able to install my under-seat tray. The problem is that when I switched to the Enduralast charging and electronic ignition system I mounted the reg/rec in the same location. So that meant I had to relocate that first.

    20190619_102904.jpg

    Now there certainly seems like there should be space on the side of the bike behind the side-cover (and there is) but it actually took about 3hrs of slight adjustments to make sure the clearance was balanced between...
    - the fender and tool tray
    20190619_140251.jpg

    - the clip on the frame
    20190619_140303.jpg

    - the cover, which needs to be tipped in and perfectly aligned to slide into place.
    20190619_112846.jpg


    Eventually, I found just the right location and with some left-over bits of aluminum and brass I got it monuted.
    20190619_140241.jpg

    This obviously looks too homemade/erector set construction for me, but it will do for now as a test. Then after a couple of rides to make sure everything is good, a proper single-piece bracket will get made.
  15. nobbylon

    nobbylon Long timer

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    Can you not make a flat bracket and mount underneath the rear of the backbone? Tray would fit and it would look tidier. My Boyer has been mounted there for 20 years with a zip tie.
    Should be more than enough cooling if you mount it to a flat ally plate?

    BE5CF32F-94A4-4839-9B71-C031163919FA.png
  16. sprouty115

    sprouty115 Long timer Supporter

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    Oh, and I almost forgot - while I was playing around with all that I had to pull the tank to get some access to the wire loom. And that's when I discovered my master cylinder was leaking...so that is now on "the list".

    Considering the brakes are truly tough on this bike, I'm weighing my options. Right now I'm somewhere between sleeving the bore down and dropping in a 2nd disc.

    Decisions, decisions...
  17. sprouty115

    sprouty115 Long timer Supporter

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    It's hard to tell from the pic, but it has fairly tall fins on the other side. So it didn't seem like it would fit on the side of the backbone (like the Dyna coil does) or directly under it, between the frame and air cleaner cover.

    I can give it another look though just to make sure, as that certainly would look cleaner.

    Edit to add - that location is also much hotter than behind the cover, which is something to consider.
  18. nobbylon

    nobbylon Long timer

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    If you go double disc go to a 16mm MC with 38mm calipers like a 90s set up. Works superbly with braided lines.
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  19. sprouty115

    sprouty115 Long timer Supporter

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    You have a 90S, damn! And that color!

    Well, that is certainly an option I'm considering. Btw, please don't post a link to a whole front end - my wallet knows how little control I have.


    Back to the R/R - that spot on my bike is currently occupied by the ignition control module. Though it is smaller and might be easier to relocate if th R/R fits.
  20. nobbylon

    nobbylon Long timer

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    I bought a new 16mm MC 2 years ago from Germany for €350 ! ridiculous price but it works and doesn’t leak which my old one did. I’ve had the 90s for 20 years now, my all time favorite bike but I’m also a fan boy for anything /6.
    I put a braided line and recon’ MC on my 75/6 but the single disc just can’t compete with the twin disc set up. My old MC could be re sleeved and I’m looking out for a r/h fork leg to do the conversion but they’re like Unicorn’s teeth and whoever has them seems to think they have the holy grail.
    Those levers look great now on your 90 btw. It’s always a small victory when something else gets sorted :)
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