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Thread: Highest speed achieved on an XB?

  1. #1

    Highest speed achieved on an XB?

    Just curious to see what everyone else says. My xb12r stock hit 135 and had a little left in it. Previous owner said he did 145 but it was done after that. I know this topic gets beat to death but I am always curious since there's always someone who claims they did 160+ on a stock xb

  2. #2
    Senior Member
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    I'm on the limiter @ Thunderhill's front straight every lap. How fast, can't see the speedo thru the black tape.

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  4. #4
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    My previous stock X1 did 150mph 240km/h in counter, in my XB i havent have the guts to try it.

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    All,

    Well my stock 09 Uly with a biggish windscreen makes it to 105mph and that's it--My '67 650 Norton Dominator, about the same. The Uly has twice the cc's, same weight and 50 years newer--am I missing something here?

    Opto

  6. #6
    Senior Member 06xbss's Avatar
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    Quote Originally Posted by optomist View Post
    All,

    Well my stock 09 Uly with a biggish windscreen makes it to 105mph and that's it--My '67 650 Norton Dominator, about the same. The Uly has twice the cc's, same weight and 50 years newer--am I missing something here?

    Opto
    Maybe clutch slipping or not adjusted correctly......?? I can hit 110mph easily with my GF on the back(combined weight 340lbs) and it's not even topped out.

  7. #7
    Senior Member Cooter's Avatar
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    I had a tune I thought was good and got about 110mph on the STT on a 3 mile run. Added 15% to the fuel map for fun and did the same stretch at 135mph much more easily. Just goes to show ya, tune tune tune!

  8. #8
    Senior Member pdksh's Avatar
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    2008 Uly with large windscreen, hits 100MPH in a flash then crawls from there, I have never waited to see what it would climb too. 100% stock. Also using the Speedo, no idea about possible error in the Speedo, may have been doing 135mph :-)

    My X1 slays the Uly, it has a pipe and I suspect a tune. Still never went much more then 100mph but of course it's Speedo is in KM per Hour.

    Damn 5 speed gear boxes!!!

  9. #9
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    Thanks, pdksh, for confirming. Cooter says 105 is "pretty good for a Uly". Now the EBR--total other story and no, I have never run it out.

    Opto

  10. #10
    Senior Member Cooter's Avatar
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    Quote Originally Posted by optomist View Post
    Thanks, pdksh, for confirming. Cooter says 105 is "pretty good for a Uly". Now the EBR--total other story and no, I have never run it out.

    Opto
    Well, I couldn't catch you so....





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