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Thread: Primary Gearing Reducer

  1. #1
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    Has anyone ever used this on an xb12? I really wanna know how much of a difference it makes and what kind of top speed you are getting after the conversion.

    http://www.americansportbike.com/sho...147h3r6r5ds4i4

  2. #2
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    It's literally the xb9 gearing in the xb12. the top speed will drop to like 130 but it gains a decent amount of pull on the low end (not that it's really needed).

  3. #3
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    Ya I understand its just the xb9 gearing in the xb12.

    #1 My xb12 wont go 130 so Idk where that info is coming from.

    #2 Did anybody on here actually swap the stuff?

    I want to hear from someone that did it and had actual results. I can sit here and ponder all day on what it would do but at the end I'm still left wondering because I dont know exactly.

  4. #4
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    I have ridden several 12s with the XB9 primary gearing. Just shy of 130mph is where the 12 will top out with the gearing change and it makes 1st gear wheelies a good bit easier. I'm not a big fan of it only because you do shift into 5th sooner around town, but not by a lot.

  5. #5
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    Are the Rpms on the highway much higher than with the stock gearing?

  6. #6
    I have a xb12 with the xb9 gearing and I run about 4000 rpm at like 75 I believe... I bought it that way so not sure how different it is from stock

  7. #7
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    That's not too much different from mine. Any idea what it tops out at?

  8. #8
    No I've never topped it out

  9. #9
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    My xb12 wont go 130
    If your XB12 won't do 130 you have a problem, the gearing should let it get to 143

  10. #10
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    143? Mine definitly won't do that.



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