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Buell Forum » XBoard » Buell XBoard Archives » Archive through March 29, 2005 » Changing Sprocket Ratio on Primary? « Previous Next »

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Tomzweifel
Posted on Friday, March 25, 2005 - 03:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Hi, all. New to the group, picked up a leftover '03 9R in December and I've been riding the heck out of it, snow be darned!

I'm less than thrilled with how high the engine is revving cruising at 75-80 or so on the highways, and I was thinking about changing the engine sprocket from the stock 34 teeth to 36 or 38. From what I'm not reading, it doesn't seem as though this is common.

Has anyone had any experience doing this? Am I better off just changing the pulley on the secondary?

Thanks!
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Slaughter
Posted on Friday, March 25, 2005 - 03:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The Brits are required to have higher gearing because of fuel economy standards

Don't know if the XB uses the same ratios as the Brits - but the swap on the tubers was a pretty common practice - a guy here wanting higher ratios would just swap gears with a Brit - and presto, cheapo - saves a couple hundred $$$ over new bits.

THE UK Buell discussion board is http://www.ukbeg.com
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M1combat
Posted on Friday, March 25, 2005 - 04:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

There are a couple places that sell "extra speed" primary kits.
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Fullpower
Posted on Friday, March 25, 2005 - 04:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

the stock primary drive sprocket (engine) and chain from the XB 12 iS About 10% taller gearing, and will fit on the 9.its a bolt on affair, all oem parts, and with a new gasket and quart of trans oil should come in under 200 bucks. i dont think the 9 has the balls to push a taller gear however. cheep enough to experiment and see if you like it.
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Fullpower
Posted on Friday, March 25, 2005 - 04:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

by the way, welcome to the board, and i hope you are enjoying the heck out of the XB. the 9 that i rode did not mind running 80 at all, it was right about where i shifted up to 4th gear.
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M1combat
Posted on Friday, March 25, 2005 - 05:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

On a twelve you "can" do 80 in second... I wouldn't do it for long, but it's 60, 80, 100, 120, ~140 as far as speed/gear. I'd still like to have a taller fifth or a sixth though... I just can't stand running ~5400RPM's at ~110MPH for too long. It makes me nervous, but that's what traffic does around here...
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Fullpower
Posted on Friday, March 25, 2005 - 07:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

M1 are you serious? traffic runs 110 MPH around there? you've got to be kidding right?
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Fullpower
Posted on Friday, March 25, 2005 - 07:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I'd say get a Hayabusa or a Blackbird for commuting, and keep the XB for weekend fun.
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Wyckedflesh
Posted on Friday, March 25, 2005 - 10:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Yup FP there are a couple of areas around here that traffic averages 90-100 in packs.
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M1combat
Posted on Saturday, March 26, 2005 - 01:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Yeah... 90-100 is probably more correct. I always try to stay 10 over traffic if it's not too heavy.

I've been in a group of SUV's doing 115...

Funny thing is about that stretch of road... It's basically either WFO or backed up due to a wreck...
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