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Thread: Why does a R75/6 feel better to me than the R90?

  1. #1

    Why does a R75/6 feel better to me than the R90?

    I have been riding a loaner bike from my mechanic, a 74 R75/6, my bike is 76 R90/6. The problem is i cant get enough of riding the R75, it just makes me grin, smoother, rides softer, seems to run through the gears nicer and i like the old controls on the turn signals and such. I hate to ask this but am i crazy, or am i missing something?


    Thanks Greg

  2. #2
    Focused kbasa's Avatar
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    Quote Originally Posted by bluecycle3 View Post
    I have been riding a loaner bike from my mechanic, a 74 R75/6, my bike is 76 R90/6. The problem is i cant get enough of riding the R75, it just makes me grin, smoother, rides softer, seems to run through the gears nicer and i like the old controls on the turn signals and such. I hate to ask this but am i crazy, or am i missing something?


    Thanks Greg
    Sounds like you're missing an R75/6 in your garage!
    Dave Swider
    Marin County, CA

    Some bikes. Some with motors, some without.

  3. #3
    Little Egypt Airheads
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    Quote Originally Posted by bluecycle3 View Post
    I have been riding a loaner bike from my mechanic, a 74 R75/6, my bike is 76 R90/6. The problem is i cant get enough of riding the R75, it just makes me grin, smoother, rides softer, seems to run through the gears nicer and i like the old controls on the turn signals and such. I hate to ask this but am i crazy, or am i missing something?


    Thanks Greg
    Many old "airheads" (myself included) think that the R75/6 was really the high water point of BMW classic design. When the slash 5's were born (1970) the engine was designed specifically as a 750cc powerplant and was balanced and engineered for that size. The slash 6 was a definite improvement over the slash 5 but BMW also started competing more heavily with the big Japanese multi's and got into a displacement race. The powerplant could handle up to a litre in size but, over 750cc, engine balancing became a problem since all the designers did was increase the bore size of the engine leaving the lower end unchanged. I have both an R75/6 and an R100RT. The RT goes faster and feels more comfortable on long tours but, oh my my, the little slash 6 is sooo smooth and quiet.

  4. #4

    why

    kbasa, thats the big problem right now, i cant explain to the wife why i need 2 bikes that look the same. thanks greg

  5. #5
    P Monk
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    my first BMW

    was a 1975 R75/6.
    It was smooth, simple, fun to ride and why the heck did I ever sell it?

    My two biggest mistakes were selling my black R75/6 and my Gold and white 94 Electraglide Ultra Classic.

  6. #6
    535IS
    Guest
    Quote Originally Posted by lbrackr756 View Post
    all the designers did was increase the bore size of the engine leaving the lower end unchanged.
    Now that the thread is down to pointless observations, how about this one:

    If it's a boxer, the "lower end" isn't actually lower; it's in the middle. And if it's in the middle, it can hardly be an "end", can it?

  7. #7
    Registered User
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    less moving mass = smoother motor.
    mechanic owned bike = (likely) tuned to perfection
    Ride Safe, Ride Lots

  8. #8
    Huckleberry, Gilera &Toad kstoo's Avatar
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    Quote Originally Posted by bikerfish1100 View Post
    less moving mass = smoother motor.
    mechanic owned bike = (likely) tuned to perfection
    so true.
    I just added an R60/6 to my stable that I purchased from Beemerhill. Brian had put the top end from another bike into that engine and he balanced parts as he assembled it. Then it was 'tuned' so nicely. When you were talking about your R75 I could compare the same experience between the R60 and R100.

    Quote Originally Posted by bluecycle3
    thats the big problem right now, i cant explain to the wife why i need 2 bikes that look the same.
    because the R90/6 doesn't go with this outfit?
    1980 R100T (Gilera), 1982 R100RT (Toad), 1975 R60/6 (cern?ícalo)
    Adventures at the Cave

  9. #9
    Seaweed
    Guest
    That is good to hear as I've just added a 1977 R75/7 to my stable. I noticed how smooth it is on my first couple of rides despite needing a carb adjust.

    I'll probably make a pest of myself around here with questions as I go through it mechanically.

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