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Thread: Xb9 city x highway speed with less rpm?

  1. #1
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    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
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    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
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    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
    Senior Member Barrett's Avatar
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    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
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    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
    Senior Member 34nineteen's Avatar
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    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!

  7. #7
    Senior Member Cooter's Avatar
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    If you just go 3 more MPH, you'll get to your destination before you even leave!

  8. #8
    Senior Member Dobe1's Avatar
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    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

  9. #9
    Senior Member outthere's Avatar
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    Evolution has aluminum pulleys both big and small.

  10. #10
    Senior Member outthere's Avatar
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    I'll keep my opinion to myself. Your welcome.



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