Page 1 of 2 1 2 LastLast
Results 1 to 15 of 20

Thread: Rear sprocket F800gsa 2017

  1. #1

    Question Rear sprocket F800gsa 2017

    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
    Last edited by TJM; 07-12-2017 at 08:12 PM. Reason: acurracy

  2. #2
    Quote Originally Posted by TJM View Post
    have new 2017 f 800 gsa, frt sprocket is 15 and rear is 47 i think? 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
    Why? This appears to me to be putting the top gear into engine-lugging territory. What was your previous bike?
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  3. #3
    SURVIVOR akbeemer's Avatar
    Join Date
    Jul 2007
    Location
    Big Sky Country
    Posts
    7,449
    I think 4500 RPM is right in the sweet spot for cruising with the F800 motor.
    Kevin Huddy
    The Outpost, Silver City, Montana

  4. #4
    Fortis Fortuna Adiuvat Omega Man's Avatar
    Join Date
    Jan 2010
    Location
    Mansfield,MA
    Posts
    14,281
    It's not a big expense and just work to try it........With my '09 F800GS, I'm thinking that a 3T change would make a "roll-on" throttle pass a gear dropper. A hard pass would require dropping 2 gears.
    Let us know how you make out.
    OM
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

  5. #5
    Quote Originally Posted by PGlaves View Post
    Why? This appears to me to be putting the top gear into engine-lugging territory. What was your previous bike?
    Was 2010 r1200 GS rode 4 corners in 2014; idea with 6th gear and 4500rpm was on highway at speed , reduce vibration and ease up on engine rpm with loosing to much torque. Can use gear box to shift at low end but need a smoother top end ??? thoughts.

  6. #6
    Quote Originally Posted by Omega Man View Post
    It's not a big expense and just work to try it........With my '09 F800GS, I'm thinking that a 3T change would make a "roll-on" throttle pass a gear dropper. A hard pass would require dropping 2 gears.
    Let us know how you make out.
    OM
    Will let you know how it works out, going to NC in August and will give the bike a good run.

  7. #7
    Riding for the SON
    Join Date
    Mar 2003
    Location
    Pasco Wa.
    Posts
    190
    Quote Originally Posted by TJM View Post
    have new 2017 f 800 gsa, frt sprocket is 15 and rear is 47 i think? 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
    Get the F650gs set up which is 17 42

  8. #8
    Registered User
    Join Date
    Dec 2006
    Location
    gig harborr ,wa
    Posts
    900
    Quote Originally Posted by akbeemer View Post
    I think 4500 RPM is right in the sweet spot for cruising with the F800 motor.
    Yes ,you are right.

  9. #9
    Registered User
    Join Date
    Dec 2006
    Location
    gig harborr ,wa
    Posts
    900
    The boxer engine and the F engine have two total different characteristic. The F needs to rev, it does not like to lug. When you change sprockets I would try it out on a until 500 mile run first. Hopefully this bike is only for highway use? Let us know how it works out.

  10. #10
    Riding for the SON
    Join Date
    Mar 2003
    Location
    Pasco Wa.
    Posts
    190
    Quote Originally Posted by EUGENE View Post
    Yes ,you are right.
    Mine becomes very bussey at 5000 rpm--80 mph.

  11. #11
    Quote Originally Posted by EUGENE View Post
    The boxer engine and the F engine have two total different characteristic. The F needs to rev, it does not like to lug. When you change sprockets I would try it out on a until 500 mile run first. Hopefully this bike is only for highway use? Let us know how it works out.
    only plan for highway and trip to alaska, some off road and gravel but very little. Thanks for your thoughts and everyone who help me think this through.

  12. #12
    Quote Originally Posted by ROYBARNES View Post
    Mine becomes very bussey at 5000 rpm--80 mph.
    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??

  13. #13
    Fortis Fortuna Adiuvat Omega Man's Avatar
    Join Date
    Jan 2010
    Location
    Mansfield,MA
    Posts
    14,281
    In the old days of dirt bikes, we used to figure 1 tooth in the front was about a shade over 3 in the rear.
    OM
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

  14. #14
    Registered User crna59's Avatar
    Join Date
    Apr 2017
    Location
    Issaquah, WA
    Posts
    106
    Quote Originally Posted by Omega Man View Post
    In the old days of dirt bikes, we used to figure 1 tooth in the front was about a shade over 3 in the rear.
    OM
    I want to also note that I've read to not make both sprockets even #'s....

  15. #15
    Quote Originally Posted by ROYBARNES View Post
    Get the F650gs set up which is 17 42
    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.

Similar Threads

  1. Weighing in on the F800GSA Versus the R1200GS
    By romany in forum Motorrad
    Replies: 7
    Last Post: 07-19-2017, 02:35 AM
  2. F650cs rear sprocket - issues again
    By wisconsinkris in forum Thumpers - F & G bikes
    Replies: 0
    Last Post: 04-30-2012, 01:25 PM
  3. 2005 f650CS - loose rear sprocket?
    By wisconsinkris in forum Thumpers - F & G bikes
    Replies: 18
    Last Post: 02-05-2012, 03:40 AM
  4. Noise in rear sprocket area
    By Jeffries in forum Thumpers - F & G bikes
    Replies: 2
    Last Post: 08-27-2009, 11:29 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •