Gearing change on 8th gen..has anybody done this?

Discussion in 'General VFR Discussions' started by Honda88, May 17, 2019.

  1. Honda88

    Honda88 New Member

    Country:
    United States
    Joined:
    Mar 29, 2019
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    1
    Just seeing if anyone has done this. I'd love to hear someone's experience.. thinking about going 2 up on rear sprocket... does the gear indicator just not work anymore and read --
     
  2. fink

    fink Member

    Country:
    United Kingdom
    Joined:
    Mar 6, 2013
    Messages:
    1,257
    Likes Received:
    336
    Trophy Points:
    113
    Location:
    Ardnamurchan Penninsula, Scotland
    Map
  3. Honda88

    Honda88 New Member

    Country:
    United States
    Joined:
    Mar 29, 2019
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    1
    So does it just not work If you change gears? Really looking for input from someone who has done this.
     
  4. fink

    fink Member

    Country:
    United Kingdom
    Joined:
    Mar 6, 2013
    Messages:
    1,257
    Likes Received:
    336
    Trophy Points:
    113
    Location:
    Ardnamurchan Penninsula, Scotland
    Map
    Reading what it says I would say no, it will not work.

    Why you want to change gearing?
     
    James Bond likes this.
  5. 2027Matt

    2027Matt Insider

    Country:
    United States
    Joined:
    Jun 7, 2017
    Messages:
    52
    Likes Received:
    17
    Trophy Points:
    38
    Location:
    Garfield Heights, Ohio
    Map
    Sounds like the position of the shifter. It will work if you go one less on the countershaft.
     
  6. Allyance

    Allyance Insider

    Country:
    United States
    Joined:
    Nov 20, 2013
    Messages:
    3,268
    Likes Received:
    276
    Trophy Points:
    128
    Location:
    East Bay, California
    Map
    I have noticed that if I leave my foot rest on the gear shifter for a while, the indicator will stop working. I am sure it has something to do with self diagnosis. Sometimes it comes back, others require shutting of engine momentarily.
     
  7. Honda88

    Honda88 New Member

    Country:
    United States
    Joined:
    Mar 29, 2019
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    1
    The stock gearing is designed for fuel economy....I'd rather use the horsepower for better acceleration.
     
  8. NorcalBoy

    NorcalBoy Member

    Joined:
    Aug 29, 2007
    Messages:
    5,112
    Likes Received:
    418
    Trophy Points:
    83
    Location:
    Desert Southwest
    Map
    Definitely. It also tightens up the gearbox and makes it more friendly when you're hustling.
     
    Honda88 likes this.
  9. fink

    fink Member

    Country:
    United Kingdom
    Joined:
    Mar 6, 2013
    Messages:
    1,257
    Likes Received:
    336
    Trophy Points:
    113
    Location:
    Ardnamurchan Penninsula, Scotland
    Map
    Twisting your wrist faster has same result, or even fitting a quick action throttle.

    At 6.5 k there will only be about 3 mph difference.
     
    Thumbs likes this.
  10. NorcalBoy

    NorcalBoy Member

    Joined:
    Aug 29, 2007
    Messages:
    5,112
    Likes Received:
    418
    Trophy Points:
    83
    Location:
    Desert Southwest
    Map
    I have a couple of questions for you, Fink. Have you ever done it?, and if so, what was your personal experience?
     
    Honda88 likes this.
  11. FJ12rydertoo

    FJ12rydertoo Member

    Country:
    United States
    Joined:
    Mar 28, 2008
    Messages:
    2,003
    Likes Received:
    195
    Trophy Points:
    63
    Location:
    Platte City, MO
    Map
    Hmmm, I question that it would only be 3 mph. I changed my rear sprocket to a 45 tooth from
    the stock 43 tooth, and it made a huge difference with the speedometer. It went from about 7%
    fast to almost 15% fast.

    Before when I was showing 75 mph, I was doing about 72 mph, but now 75 mph is about 65 mph.
    That's why I put the bicycle computer on mine.
     
  12. Honda88

    Honda88 New Member

    Country:
    United States
    Joined:
    Mar 29, 2019
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    1
    With a higher gear ratio you would reach vtec faster aka the powerband....there is no reason for the vfr to be geared the way it is...the vfr is a sport touring bike. It's meant to be highway and twisty roads friendly. It doesnt need to go 140 mph to accomplish this.
     
    Last edited: May 18, 2019
  13. NorcalBoy

    NorcalBoy Member

    Joined:
    Aug 29, 2007
    Messages:
    5,112
    Likes Received:
    418
    Trophy Points:
    83
    Location:
    Desert Southwest
    Map
    I say just give it a go, Honda88. You might figure out that it doesn't work initially, then again, you might find it's a non issue. You could do a little experiment, hell, think of it as cheap education. When there is a will, there is always a way. If I had an 8g, I probably would have already done it, but I don't, sorry I can't give you a definitive answer. I totally agree with the gearing change, it's like a different bike. Motorcycling wouldn't be where it is today if people didn't push the envelope. No guts, No glory. Post up what you decide. Personally, I never could understand the need for such a device.
     
  14. fink

    fink Member

    Country:
    United Kingdom
    Joined:
    Mar 6, 2013
    Messages:
    1,257
    Likes Received:
    336
    Trophy Points:
    113
    Location:
    Ardnamurchan Penninsula, Scotland
    Map
    Check out gearing commander speeds for revs.
     
  15. fink

    fink Member

    Country:
    United Kingdom
    Joined:
    Mar 6, 2013
    Messages:
    1,257
    Likes Received:
    336
    Trophy Points:
    113
    Location:
    Ardnamurchan Penninsula, Scotland
    Map
    Have done it loads times, love doing it. Mmmmmm

    Yeah mucked around with gearing on me Cbr6 and fitted a qat to boot. Never felt the need on the road only the track.

    Mate had +2 on vtec not much difference between them on a roll on.

    What were your experiences?
     
  16. NorcalBoy

    NorcalBoy Member

    Joined:
    Aug 29, 2007
    Messages:
    5,112
    Likes Received:
    418
    Trophy Points:
    83
    Location:
    Desert Southwest
    Map
    Based upon your response, would it be safe to say that you don't have any personal experience and you have not changed the gearing on a VFR?
     
    Last edited: May 19, 2019
  17. FJ12rydertoo

    FJ12rydertoo Member

    Country:
    United States
    Joined:
    Mar 28, 2008
    Messages:
    2,003
    Likes Received:
    195
    Trophy Points:
    63
    Location:
    Platte City, MO
    Map
    Can't, they want me to turn off my adblocker. Screw 'em.
     
  18. NorcalBoy

    NorcalBoy Member

    Joined:
    Aug 29, 2007
    Messages:
    5,112
    Likes Received:
    418
    Trophy Points:
    83
    Location:
    Desert Southwest
    Map
    There is one at CRF's Only that's a little less cumbersome. No restrictions on Adblocker.

    https://www.crfsonly.com/howto/gearing/motorcycle-gearing-calculator.php

    Even though it says it's for CRF's, it will work for any machine if you input your data. I only use it for percent of change between current and hypothetical
     
  19. FJ12rydertoo

    FJ12rydertoo Member

    Country:
    United States
    Joined:
    Mar 28, 2008
    Messages:
    2,003
    Likes Received:
    195
    Trophy Points:
    63
    Location:
    Platte City, MO
    Map
  20. fink

    fink Member

    Country:
    United Kingdom
    Joined:
    Mar 6, 2013
    Messages:
    1,257
    Likes Received:
    336
    Trophy Points:
    113
    Location:
    Ardnamurchan Penninsula, Scotland
    Map
    No I haven't on a vfr , but my mate went +2 on his 6th gen as you call them, compared to mine not much difference at all 50 odd yards over 1/2 mile, swapped over and much the same.

    Cbr track day -1 front +2 rear made a big difference even more so with a QAT. Speedo would have been way out. lost out on top speed but would never get anywhere near that on a short track.

    Stock gearing on vfr 4th gear 5k revs 54.8mph, 6k 65.8mph , 7k 76.7mph, 9k 98.6mph

    +2 on rear 4th gear 5k 52.4 mph, 6k 62.8mph , 7k 73.3mph, 9k 94.3mph

    There will be a drop off on power as your decreasing the final ratios.
     
Related Topics

Share This Page