Overdrive Light - Not Too Bright (not that I should throw stones)
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  1. #1
    Senior Member
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    The OD light isn't very bright for sure. I installed a red gear indicator light under the left speaker grill. Used some very sticky putty tape to mount it.
    It has worked flawlessly, and you can see it in the sun. I installed a blue volt meter of the same size under the right speaker grill.
    But I agree the B could use another gear, or, Spread them out more.
    First gear is a creeper gear and I only use it when taking off on hills.
    The motor has plenty of power for a better gear ratio set up. 3k rpm at 70 is a bit much for the power it has.
    Id like to see it around 2600rpm where your getting into the low end of the power band.
    ITS ALL GOOD

  2. #2
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    Have you heard of HENRY’s Final Drive?
    It’s a remanufactured final assembly with taller gear ratio.
    It actually puts the rpm right where you mentioned.
    I installed it on my 2016 F6B last December and I cannot be happier!
    Mine runs right around 3000rpm @80mph.

    I highly recommend it!

  3. #3
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    Just did an rpm check on mine to be sure, I thought what felt like a lower rpm, but got it substantiated on the highway.

    3150 RPM at 80 MPH (gps) almost identical with speedo in 5th gear, did the "Darkside" 195/55/16 works great.

    3000 RPM at 70 MPH.
    Last edited by maxrider; 07-11-2021 at 10:20 PM. Reason: info

  4. #4
    Senior Member willtill's Avatar
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    Quote Originally Posted by BBB View Post
    Have you heard of HENRY’s Final Drive?
    It’s a remanufactured final assembly with taller gear ratio.
    It actually puts the rpm right where you mentioned.
    I installed it on my 2016 F6B last December and I cannot be happier!
    Mine runs right around 3000rpm @80mph.

    I highly recommend it!
    Don't you lose some low end grunt though, when gearing that low?


    21 years Army (retired)
    ...been everywhere, seen everything, done almost everything.

    IBA 80537

  5. #5
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    Confused about the RPM I get vs the initial chart listed on page 1 with OEM specs.

    I have lower RPM with the indicated speeds, I initially thought this to be due to the change in tire size(195/55/16) but comparing the tire calculator, there is not sufficient data to support that :
    180/60-16 195/55-16 Difference
    Diameter inches (mm) 24.5 (622.4) 24.44 (620.9) -0.06 (-1.5) -0.2%
    Width inches (mm) 7.09 (180) 7.68 (195) 0.59 (15) 8.3%
    Circum. inches (mm) 76.98 (1955.33) 76.8 (1950.61) -0.19 (-4.71) -0.2%
    Sidewall Height inches (mm) 4.25 (108) 4.22 (107.25) -0.03 (-0.75) -0.7%
    Revolutions per mile (km) 823.06 (511.42) 825.04 (512.66) 1.99 (1.24) 0.2%

    Somebody set me straight .

    Did I already have a lower RPM running engine before?

    Or is the cart off in the numbers:
    OEM Gear Drive
    MPH - RPM's

    70 - 3100 (so here i dropped 100 rpm)
    80 - 3600 (here i dropped 450 rpm) this is a very noticeable drop.
    90 - 4000

    New Gear Drive
    MPH - RPM's

    60 - 2200 (Saw it on a later ride)
    70 - 2600 (500 less RPM)
    80 - 3000 (600 less RPM)
    90 - 3400 (600 less RPM)
    Last edited by maxrider; 07-12-2021 at 08:28 AM. Reason: info

  6. #6
    Senior Member 98valk's Avatar
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    Quote Originally Posted by maxrider View Post
    Confused about the RPM I get vs the initial chart listed on page 1 with OEM specs.

    I have lower RPM with the indicated speeds, I initially thought this to be due to the change in tire size(195/55/16) but comparing the tire calculator, there is not sufficient data to support that :
    180/60-16 195/55-16 Difference
    Diameter inches (mm) 24.5 (622.4) 24.44 (620.9) -0.06 (-1.5) -0.2%
    Width inches (mm) 7.09 (180) 7.68 (195) 0.59 (15) 8.3%
    Circum. inches (mm) 76.98 (1955.33) 76.8 (1950.61) -0.19 (-4.71) -0.2%
    Sidewall Height inches (mm) 4.25 (108) 4.22 (107.25) -0.03 (-0.75) -0.7%
    Revolutions per mile (km) 823.06 (511.42) 825.04 (512.66) 1.99 (1.24) 0.2%

    Somebody set me straight .

    Did I already have a lower RPM running engine before?

    Or is the cart off in the numbers:
    OEM Gear Drive
    MPH - RPM's

    70 - 3100 (so here i dropped 100 rpm)
    80 - 3600 (here i dropped 450 rpm) this is a very noticeable drop.
    90 - 4000

    New Gear Drive
    MPH - RPM's

    60 - 2200 (Saw it on a later ride)
    70 - 2600 (500 less RPM)
    80 - 3000 (600 less RPM)
    90 - 3400 (600 less RPM)
    Your before and after numbers look about right to me.
    Albuquerque, NM

  7. #7
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    Quote Originally Posted by willtill View Post
    Don't you lose some low end grunt though, when gearing that low?
    If anything, the first gear became a lot more useful. Our engine has so much torque to spare off idle, I can still creep out without giving any throttle if I had to.
    But again, my bike is a lighter F6B, not a full dresser. I’ve read people with full riding two up on full dressers also love the newer taller gearing of the Henry’s final drive.

  8. #8
    Moderator BIGLRY's Avatar
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    Quote Originally Posted by BBB View Post
    Have you heard of HENRY’s Final Drive?
    It’s a remanufactured final assembly with taller gear ratio.
    It actually puts the rpm right where you mentioned.
    I installed it on my 2016 F6B last December and I cannot be happier!
    Mine runs right around 3000rpm @80mph.

    I highly recommend it!
    Here it is for the guys who feel they want their engine to run less RPM at 70 mph, Ya just change the rear differential.
    https://henrysfinaldrive.com/

    The guy who invented the first wheel was an idiot -
    the guy who invented the second one... he was the genius!


    http://theringfinders.com/blog/Larry.Royal/

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