New Guy with R100R

Discussion in 'Airheads' started by backfill, Oct 5, 2012.

  1. lucky6600

    lucky6600 Been here awhile

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    Feb 27, 2010
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    940
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    CT USA
    Comparing to other 980cc engine, how did BMW actually do to detune the engine to make it smoother?
    Especially with the same engine block, pistons and 40 mm Bing. Only thing that I could think of would be the more fancy but more restricted exhaust to meet the emission.
    #41
  2. Airhead Wrangler

    Airhead Wrangler Long timer

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    The r100r has 32mm bings, not 40s. The pistons are not the same as earlier higher output R100s. They have a lower compression ratio of 8.5:1 compared to 9.5:1 in the higher output motors. The heads also changed from large port/valve in the in earlier models to smaller ports and valves in the later models. The exhaust doesn't do anything to meet emissions. There's no cat. Jetting also got leaner from earlier to later models.
    #42
  3. lucky6600

    lucky6600 Been here awhile

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    According to this, it has 40 mm and the 2 into 1 exhaust has a cat box under though?

    http://www.motorcyclespecs.co.za/model/bmw/bmw_r100r 92.htm
    #43
  4. Airhead Wrangler

    Airhead Wrangler Long timer

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    That's a South African website. The rest of the world got 40mm bings on r100 models up through '95, but bikes built for the US market stopped getting them in '84. That collector box is only to increase exhaust system volume (volume as in cubic ____s, not noise level) for better running and has no catalytic converter function to it, despite people commonly referring to it as a cat.
    #44
  5. lucky6600

    lucky6600 Been here awhile

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    Love the fact that US market always receives extra care.
    #45
  6. bikerfish

    bikerfish flyfishandride

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    mine has 32mm bings. I think my /7 also has them. seat of the pants dyno has the r100r quicker off the line, but runs out of steam while the /7 runs stronger near the top. I DO know the /7 motor is smoother than my r100r motor. personnally, I like the older motors with the heavy flywheels.
    #46
  7. boxerkuh

    boxerkuh Been here awhile

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    This is correct. My 1992 is a UK model with 40's and the Euro switch gear were I can turn the head light on and off. Those are the only 2 differences that I am aware off... It was a lucky find, thank you for the GI that bought the bike in England and brought it back to the States. Thank you, thank you. I hope to never have to sell it.
    #47
  8. lucky6600

    lucky6600 Been here awhile

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    Feb 27, 2010
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    CT USA
    I guess I am one of the new guys with R100R which was just picked up today.

    Everything is there and it needs a bath indeed since the PO believe in washing a bike will increase the rusting process.

    Fuel lines are a mess now, and second part of the frame was painted in black. Other than that, PO stated he can ride this bike all the way from MA to CA without an issue.


    [​IMG]


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    [​IMG]
    #48
  9. jackd

    jackd Long timer

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    Nice bike. What year and what was the mileage on it? I hate to pry but how much did you pay for it?
    #49
  10. lucky6600

    lucky6600 Been here awhile

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    It's a 92 with 47K miles on it, and you don't want to know how much I paid.
    #50
  11. red bud

    red bud alky w/motorcycle problem

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    sweet:clap
    #51
  12. bPat

    bPat n00b

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    #52
  13. Plaka

    Plaka Brevis illi vita est

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    The Motorcycling Gods know you're just gonna cafe it anyway. You're lucky you got any brakes.

    looks pretty unmolested---even the emissions crap is still there...but I don't know that model well...is that the stock dash? Did you get bags with it?
    #53
  14. lucky6600

    lucky6600 Been here awhile

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    You are going to have many many happy miles(km) in this lovely machine.

    I had chances to put some miles on mine 92'. Only thing I wish is it has a steering damper.

    Does anybody have any luck of finding or using any kind of steering devices on a 92 later R100?
    #54
  15. Plaka

    Plaka Brevis illi vita est

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    Out of curiosity, what's it doing that makes you wish for a damper?
    #55
  16. boxerkuh

    boxerkuh Been here awhile

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    In 1992 the R100R came only with one front disc from the factory. In 1993 they started with 2 front disc. They do have a "retro-fit" kit for the 92 year to add a second front disc. Truth be told, most people added the second disc. Hope that helps.
    #56
  17. lucky6600

    lucky6600 Been here awhile

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    Location:
    CT USA

    trying to follow those 600 SS bikes at some back roads ....



    :evil
    #57
  18. dricley

    dricley n00b

    Joined:
    Jun 8, 2013
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    1
    Another new guy - another recently purchased R100R.

    1992
    18,000 miles

    First BMW - I'd been looking for a while. Is there a company that makes an aftermarket passenger backrest? What about bike specific tail bags?

    Thanks! Looking forward to spending the summer riding..
    #58
  19. 97oilhead

    97oilhead Been here awhile

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    I ended up getting a Corbin with the backrest for the passenger or driver if you want. You can keep an eye out for a used one the same model is used on the R100GS.
    #59
  20. bPat

    bPat n00b

    Joined:
    Jun 17, 2013
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    Picked up the 1992 R100R last night, got to drive it about 100 miles home. A little shaky at first getting used to the turn signals and slow turns, but I feel much more confident now. I did get beautiful side hard cases with it and a slightly higher cafe style fairing as well as the original. A couple of times I've had problems getting out of neutral into first. I would release the clutch, roll the bike slightly and then I can hit first easily. Is this something common or a sign of big problems? It just purred on the highway, I think it's such a beautiful bike. It's so clean and flawless, hard to believe it's over 20 years old. It's totally original, the first thing my buddy says is to cut the fuel lines and put in a fuel filter, I want to keep it stock.

    I think it's the stock dash, but the previous owner added a classy clock between the tach and speedometer.
    #60