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Buell Forum » 1125R Superbike Board » 1125R Questions & Answers » Slipper clutch adjustment? « Previous Next »

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Xb9
Posted on Wednesday, January 02, 2008 - 07:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Question for the factory guys:

We read that the pre-production bikes had an adjustment for the sensitivity of the slipper action clutch.

Is it adjustable on the production 1125r's? If so how is it adjusted?
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Baggermike
Posted on Wednesday, January 02, 2008 - 10:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

cool can not wait, my bike is like the ulysses I rode and feel it is not working and needs adjustment. Mike
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Baggermike
Posted on Friday, January 04, 2008 - 02:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the bike felt much better today, just got back from a 100 mile run and the slipperclutch is working, NICE. Mike
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Anonymous
Posted on Friday, January 04, 2008 - 04:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The 1125R slipper clutch is not adjustable. The total amount of engine braking can be controlled somewhat through changes to the IAC (idle air control) and other parameters programmed into the ECM software. We were still finalizing some of these calibrations early at the press event. These are not user programmable because they can potentially effect exhaust emissions and EPA regulations.

Remember that the amount of clutch slipper action is manifold vacuum dependant. Vacuum is dependant on RPM and throttle position, thus maximum slip is achieved at high RPM with a fully shut throttle. This makes the slipper action much more noticeable at race-track speeds and less noticeable at “normal” street speeds & RPM’s.
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Xb9
Posted on Friday, January 04, 2008 - 05:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Anonymous, I had a feeling it was only adjustable on the pre-pro units.
As long as you guys have it dialed in, I guess there's no need for us to want to mess with it! Thanks for clarifying.
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Fresnobuell
Posted on Saturday, January 05, 2008 - 01:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The slipper clutch action was not real noticeable at break in speeds, although I felt it a few times on the ride home from the dealer. I believe i will like the idea of eliminating or severely reducing engine braking. There were a couple instances on my ride home on the 1125r where on the XB I would be using engine braking to do most of the stopping, then the brake to complete the stop. Well, on the 1125r I found I was using the brake from the beginning of the stop without much braking from the engine as I downshifted. It did feel more controlled. I'll see how I like it as the engine breaks in and speeds pickup. as long as the brakes can stop this beast without engine assistance, I think the slipper action is great.
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Jak49
Posted on Saturday, September 03, 2011 - 12:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Has anyone had a drive belt brake with less than 12,000 miles?
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