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Thread: Rear sprocket F800gsa 2017

  1. #16
    http://www.sprocketcalculator.com

    This will take current ratio and let you know up or down on torque and speed.

  2. #17
    Riding for the SON
    Join Date
    Mar 2003
    Location
    Pasco Wa.
    Posts
    183
    Quote Originally Posted by TJM View Post
    just talked to my dealer who looked up my vin and confirmed my ratio. my 2017 F800 GSA has a 16t frt. and 42t rear sprocket. now need to calculate engine RPM at 80 MPH. Goal for me is to reduce engine RPM to 4000 or less at 80 mph.
    Won"t happen.

  3. #18
    Riding for the SON
    Join Date
    Mar 2003
    Location
    Pasco Wa.
    Posts
    183
    Quote Originally Posted by TJM View Post
    How did you handle it or are you living with it?? not sure a 650 set up is right?? delaer suggested going to a rear sprocket of 44t rather than 47t and leave frt alone??
    The buss or high speed vib, is getting less all the time. I never used to run 80 and over until they increased the speed limits. I made a cross country trip this summer and spent a lot of time in the higher speed range. It ether became less or I just got used to it. The bike is well brook in as it now has 173,000 miles on it. F650gs 2009.

  4. #19
    Quote Originally Posted by TJM View Post
    have new 2017 f 800 gsa, frt sprocket is 16 and rear is 42. I ride cross country and and RPM is 4500 at 75 mph would like to drop that down and run at 80 mph at around 4000 or just slightly less. I am think a 44 tooth rear gear would get me closer to what I need. Any help out there or suggestions, my first time messing with rear sprockets and charts are helpful but experience best teacher. thanks, TJM 112299
    Going with more teeth in the back would increase your RPM.
    If that has been pointed out already I missed it.


    Sent from my iPhone using Tapatalk

  5. #20
    I rode out and back for the east coast to the rally on a 17t front and stocker on my 2016 800 gsa. It was about a 500-600 rpm drop and made it more pleasant droning down the highway.

    I just replaced all my sprockets as I needed a new chain from off-road out on the COBDR. MY 17t front that I just swapped out has about 9k miles on it. Happy to send it to you if you'd like to try it out.

    Cheers

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