Page 1 of 2 12 LastLast
Results 1 to 10 of 18

Thread: Xb9 city x highway speed with less rpm?

  1. #1
    Junior Member
    Join Date
    Jun 2020
    Posts
    1

    Xb9 city x highway speed with less rpm?

    I am new to the forum this is my second buell first was a thunderbolt. I now own a 2005 xb9 city x want to know if there is anything that can be done to make interstate riding better by lowering rpm at 80 mph i am turning in the neighborhood of 4-4500 rpm I don't want to go to chain drive wanna keep belt is there anyway to swap pulleys out to decrease ram or maybe if I have to go into primary and change gearing there if possible any help would be much apprieciated

  2. #2
    Senior Member
    Join Date
    Jun 2015
    Location
    Cincinnati
    Posts
    287
    Xb12 primary gearing. That will drop your rpms to 3900 in 5th gear at 80mph. The other option would be a chain conversion.

  3. #3
    Senior Member outthere's Avatar
    Join Date
    Jun 2018
    Posts
    496
    cheaper alternative is to slow down 5 mph. It will get you there about as quick and will be a hell of a lot cheaper if you get wrote up going 80 mph vs 75

  4. #4
    Member Barrett's Avatar
    Join Date
    Jun 2020
    Location
    AmishLand, PA
    Posts
    91
    hello Sir. the XB9SX was one of Buell's most popular and enjoyable models. there is an 11% difference in gearing between the 9 and the 12 models. the 9 is geared 11% lower than the 12...and vice-versa. in theory, the simplest method to raise 9 gearing is to go up one tooth size on your front belt pulley...purchase a longer belt compatible with this change...retain all other stock components. i know of no one including myself who has ever pulled that off. possible? perhaps. accomplished? not that i'm aware of. in the harley-davidson XR1200 world,it is a popular mod. rear wheel is adjustable, tensioner mounted differently, 29 tooth front pulley readily available, stock belt retained. not so in the Buell world.

    reach out for a board member selling a nice complete XB12 primary drive setup...or a member wanting to swap for your XB9 primary setup.
    also Sir, note attached pic. technical service bulletin(TSB) 9/05-211 changed the torque spec. i do NOT make that nut quite that tight. i go with 10% lower torque value. do as you please.
    in essence you'll be going from a 34 tooth front rotor sprocket to a 38 tooth. all newer-release factory front sprockets come with rotor attached. NOT available seperately.

    xlxb service.jpg

  5. #5
    Senior Member
    Join Date
    Jun 2015
    Location
    Cincinnati
    Posts
    287
    If you use a free spirits adjustable tensioner you can go up or down one tooth on the front pulley and still use the stock belt. I’m using a 26 tooth aluminum baker pulley with this exact setup.

  6. #6
    Member Barrett's Avatar
    Join Date
    Jun 2020
    Location
    AmishLand, PA
    Posts
    91
    Quote Originally Posted by mike lowary View Post
    If you use a free spirits adjustable tensioner you can go up or down one tooth on the front pulley and still use the stock belt. I’m using a 26 tooth aluminum baker pulley with this exact setup.

    hey mike: i should have put in my response that you would probably know.
    that right there sounds like an easy solution, assuming this guy can find the correct 1-tooth larger front belt pulley.
    very interesting.

  7. #7
    Senior Member 34nineteen's Avatar
    Join Date
    Mar 2015
    Posts
    2,087
    Quote Originally Posted by Barrett View Post
    hello Sir. the XB9SX was one of Buell's most popular and enjoyable models. there is an 11% difference in gearing between the 9 and the 12 models. the 9 is geared 11% lower than the 12...and vice-versa. in theory, the simplest method to raise 9 gearing is to go up one tooth size on your front belt pulley...purchase a longer belt compatible with this change...retain all other stock components. i know of no one including myself who has ever pulled that off. possible? perhaps. accomplished? not that i'm aware of. in the harley-davidson XR1200 world,it is a popular mod. rear wheel is adjustable, tensioner mounted differently, 29 tooth front pulley readily available, stock belt retained. not so in the Buell world.

    reach out for a board member selling a nice complete XB12 primary drive setup...or a member wanting to swap for your XB9 primary setup.
    also Sir, note attached pic. technical service bulletin(TSB) 9/05-211 changed the torque spec. i do NOT make that nut quite that tight. i go with 10% lower torque value. do as you please.
    in essence you'll be going from a 34 tooth front rotor sprocket to a 38 tooth. all newer-release factory front sprockets come with rotor attached. NOT available seperately.

    xlxb service.jpg

    Barrett,

    Do a search for a forum member named "lunatic fringe". He was selling "add a link" drive belt kits that should resolve this. He also sells extended swingarm kits, supplemental frame grounding points, as well as a kit to convert your rear wheel to fit a 240 tire. I believe he also engineered a intake flange kit for XB's that replaced the stock seal with orings. Neat stuff!

  8. #8
    Senior Member Cooter's Avatar
    Join Date
    Dec 2012
    Location
    Crawling up your skirt
    Posts
    8,048
    If you just go 3 more MPH, you'll get to your destination before you even leave!

  9. #9
    Senior Member Dobe1's Avatar
    Join Date
    Oct 2013
    Location
    Alexandria VA
    Posts
    169
    I heard through the grapevine the former Buellxb.com member, LunaticFringe / "User_Deleted", has started up a family friendly bowling alley in AMISH country, PA. The most recent local rag stated the alley was waiting until we hit PHASE 2 for the grand opening... Sign up for the upcoming bowling league!
    123.jpg

  10. #10
    Senior Member outthere's Avatar
    Join Date
    Jun 2018
    Posts
    496
    Evolution has aluminum pulleys both big and small.



Page 1 of 2 12 LastLast

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
  •