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Buell Forum » XBoard » Archive through August 23, 2010 » XB Transmission: 9 vs 12 « Previous Next »

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Dieseldreamer
Posted on Saturday, August 21, 2010 - 04:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What is the difference between the gearing in the XB9 vs the XB12? Whats more desirable for the track and whats more desirable for the street on an XB12 chassis?

Erik
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Froggy
Posted on Saturday, August 21, 2010 - 10:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Both bikes have the same transmission and final drive. (Check the gear ratios on Buell.com)

The only difference between the two is the primary chain/sprocket. The XB9 models have a shorter ratio which improves acceleration. It does reduce top speed however. The two setups can be swapped. Here is a gear ratio calculator to show you the difference:

www.froggypwns.com/Buell%20Gearing.xlsx
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Dieseldreamer
Posted on Saturday, August 21, 2010 - 04:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cool thanks for that! I know a guy around here that has an Xb12cg and he said he had something out of an XB9 transmission to make it "shoot to 100mph really quick". I got to thinking that would be an amazing add on to in order to blast around stop and go traffic.

Erik
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Andymnelson
Posted on Saturday, August 21, 2010 - 05:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Depending on the year of the bike, this is all you need:
http://www.americansportbike.com/shoponline/ccp0-p rodshow/A17150.html

Many of us have done it, it's a FANTASTIC mod!
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Dieseldreamer
Posted on Saturday, August 21, 2010 - 07:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Very cool, glad you guys helped out!

Erik
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