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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through November 17, 2009 » Weird clutch/throttle interaction. « Previous Next »

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Kevin_stevens
Posted on Thursday, November 12, 2009 - 11:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok, have the bike at idle, in gear with the clutch all the way in to the bar, like you're about to leave from a light.

Don't touch the throttle, and start to release the clutch. Just before it begins to engage, the engine speed starts to go up!

What's up with that? Is it an artifact of the vacuum clutch, or Buell trying to prevent take-off stalls??

KeS
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Ridenusa4l
Posted on Thursday, November 12, 2009 - 11:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It might be a little both im not 100% sure but i dont mind it at all, and all the 1125's do it, no worries ; )

Jake
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Avc8130
Posted on Friday, November 13, 2009 - 12:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The FI is programmed to "keep the bike running". Load goes up, it raises "idle" and keeps running.
ac
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Kevin_stevens
Posted on Friday, November 13, 2009 - 12:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

As a professional geek, I have a mantra for computers: "Quit trying to help me and do what I tell you to do!" : )

KeS
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Xtreme6669
Posted on Friday, November 13, 2009 - 08:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

weird feature... you really notice it when you put a louder exhaust on! the good news is the o.s.b.com tune gets rid of it!
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Xl1200r
Posted on Friday, November 13, 2009 - 08:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's not the ECM "trying to keep the bike running". They all do it, and it happens before there's any load put on the engine.

It's a feature, more or less. Go into diagnostics and there's a clutch state parameter that shows when this little rev up happens. At first I thought it was neat but useless, but the more I live with the bike the more I like it when having to maneuver around my driveway, or creep up at a light.
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Ccryder
Posted on Friday, November 13, 2009 - 08:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It is a feature they built into the ECM. IMHO I like it. Especially coming from a high inertia engine like the XB, to a low inertia engine like the Helicon.

It gets back to the old blonds vs. red head argument ;+}
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99buellx1
Posted on Friday, November 13, 2009 - 11:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Brunette.
Thanks.
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Froggy
Posted on Friday, November 13, 2009 - 12:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Redheads do it better : )
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99buellx1
Posted on Friday, November 13, 2009 - 12:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Why yes we do!
HAHA!
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99buellx1
Posted on Friday, November 13, 2009 - 12:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

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