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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through September 09, 2012 » Changing gearing « Previous Next »

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Weecorey
Posted on Saturday, September 01, 2012 - 06:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is it possible to change the rear sprocket on the XT to one with fewer teeth to give more low range pull? I'm thinking of a quick fix untill I get a new set of bigger headers.
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Bpt
Posted on Saturday, September 01, 2012 - 06:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Changing to XB9 primary gearing is the easiest way. You change the front sprocket/rotor and chain for about an 11% difference in ratio.
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Pontlee77
Posted on Saturday, September 01, 2012 - 08:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You got it mixed, it would be a bigger rear sprocket or a smaller front pulley, this is not possible un less is a chain driven bike.

So the option is the XB9 primary gearing.
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Buelldualsport
Posted on Saturday, September 01, 2012 - 11:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Actually, Baker Drive Train has a 26th sprocket that will fit the Buell line.

However, you would have to find a way to modify the belt tensioner to keep it under constant tension.

Good Luck
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Portero72
Posted on Saturday, September 01, 2012 - 03:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The xb9 kit is the easiest way to get what you are after. Have had mine in for 15k and would not have it any other way. It is a fairly easy install, as well.
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Weecorey
Posted on Saturday, September 01, 2012 - 06:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is this what I'm after?

http://www.ebay.com/itm/HARLEY-DAVIDSON-34T-34-TOO TH-FRONT-PRIMARY-ENGINE-SPROCKET-BUELL-XB9-FIREBOL T-/261067400193?pt=Motorcycles_Parts_Accessories&h ash=item3cc8d46401&vxp=mtr#ht_158wt_932
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Pontlee77
Posted on Saturday, September 01, 2012 - 07:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That sprocket looks to be for an 08 or newer models if your bike is an 07 it will not work.
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Hughlysses
Posted on Saturday, September 01, 2012 - 08:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

According to his profile, his bike is an 08. You need the sprocket, a different primary chain, a new crankshaft bolt, and a primary cover gasket.

American Sport Bike sells everything you need in a kit: http://www.americansportbike.com/shoponline/ccp0-p rodshow/A17192.html
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Bpt
Posted on Sunday, September 02, 2012 - 06:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The eBay sprocket is for a 2007 and prior. The 2008 and up comes with the rotor and sprocket together.
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Weecorey
Posted on Sunday, September 02, 2012 - 07:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cheers for that Hughlysses, can anyone who has this installed tell me the difference in top speed?
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Pontlee77
Posted on Sunday, September 02, 2012 - 09:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

well i guess if gear reduction is 11% i suppose top speed decreases acordingly, i seem to remember some one saying that you would be working 300 revs above of the XB12 stock primary.
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Hughlysses
Posted on Sunday, September 02, 2012 - 09:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It might not actually decrease your top speed at all; it depends on whether the bike was capable of hitting redline in 5th gear with the stock primary ratio or not. Often a motorcycle will achieve the same or even a slightly higher top speed in 4th gear because the engine can achieve maximum RPM in that gear.

If you can find a detailed road test on the Uly showing the top speed in each gear, it'll answer this question.
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Tempest766
Posted on Sunday, September 02, 2012 - 02:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I absolutely love a belt drive but I've always fealt that the fixed tension belt pulley is a design flaw. It should have been either adjustable, with lock nuts, or used a very heavy spring tensioning. That would allow for nearly whatever belt drive ratio the end user wants and also make belt changes much easier.
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Tipsymcstagger
Posted on Monday, September 03, 2012 - 07:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have an XB9 gearing kit from American Sportbike that I bought and never installed. I'm never going to install it so it's just collecting dust.

I opened the box to look at it but other than that, it's as new and never used.

If anyone is interested, let me know.

Tipsy
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Buelldualsport
Posted on Monday, September 03, 2012 - 08:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Tipsy:

May we inquire as to what years it would fit?

Thanks
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Tipsymcstagger
Posted on Monday, September 03, 2012 - 10:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My bike is a 2008 XB12X. I would imagine a quick look at the American Sportbike website would clear up any questions concerning compatible models.

Tipsy
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Buelldualsport
Posted on Monday, September 03, 2012 - 10:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Our is an 08 as well

So

PM a price shipped to 28269

If you are still interested in recooping you investment

USPS MO sent same day

Regards
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Arcticktm
Posted on Tuesday, September 04, 2012 - 12:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I swapped my '06 Uly gearing for XB9 a few years ago and really like it for my mountain riding. It's OK for highway as long as you are not planning on running 80mph+ all day.
Can't say about top speed, as I have never attempted a top speed run before or after.
I would think it only matters for track use of speed demons, which I would think is not really the Uly forte.
Anyhow, I suspect it would not drop top speed by much at all, since it seems that the Uly would be top speed limited by air drag at our horsepower levels. I could be wrong though - just my theory that I do not plan to test.
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