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Buell Forum » 1125R Superbike Board » Archive through September 11, 2015 » Brembo RCS Clutch Question « Previous Next »

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Theshinenz
Posted on Friday, August 21, 2015 - 07:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have a question regarding the clutch interlock switch on the 1125cr, I recently bought a brake and clutch RCS19 set, the brake side comes with a microswitch for the brakelight so all sorted there. However I tink i may a very expensive mistake. After advice from badweb I bought the set thinking it would be a great upgrade but theres no switch for the clutch interlock, what is this switch actually used for and can it be bypassed or something, as theres no small holes to mount a microswitch in on the clutch side like there are on the brake side so cannot just by another micro switch by the looks.

Cheers
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Theshinenz
Posted on Friday, August 21, 2015 - 07:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

On some research it looks like you can buy aftermarket clutch switches, but most look hideous and are expensive, like $100AUD for a microswitch :-O

Think I might offload these and go back to stock, just after I spent over a grand on them thn bought billet reservoirs... not sure i like the look of them on the CR anyway.
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Theshinenz
Posted on Friday, August 21, 2015 - 09:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So question is do i actually need the switch? If i were to leave the switch intact behind the front cowl and tape it on would it mean i can start the bike in any gear? Anything else i need to consider? In other words does the ecm (ebr race ecm) look to the switch for anything else other than starting?
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Xtreme6669
Posted on Friday, August 21, 2015 - 11:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You don't need the switch. Depending on the s/w in your ecu the clutch switch slightly raises the rpm of the pike when you let the clutch out. My first ebr ecu disabled this feature but my 2nd ebr ecu still uses it.
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Theshinenz
Posted on Friday, August 21, 2015 - 11:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hey thanks Xtreme, Looks like the switch is N/C so should just be able to unplug it and leave it unplugged then.

Great cant wait to get these Brembos all sorted.
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Froggy
Posted on Friday, August 21, 2015 - 11:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The switch provides two functions, first it is used as part of a safety to prevent you from starting the bike in gear, and second it ties in with the idle control. The ECM adjusts the idle based on if the clutch is in or out, it raises it as you release the clutch to make it easier to get off the line. It doesn't do anything major to the bikes driveability, you just may find it more easy to stall or notice the RPMs drop faster when you do squeeze the clutch, depending on if it thinks the clutch is always open or closed.
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Theshinenz
Posted on Saturday, August 22, 2015 - 03:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hmm ok, I might test the contacts to see if they open or close with clutch pulled in as will determine whether i can put a Banjo Bolt pressure switch on which im pretty sure are N/O configuration.

Cheers
Scott
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Stimbrell
Posted on Saturday, August 22, 2015 - 05:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The reason the ecm raises the revs in gear with the clutch out is to reduce the engine breaking, if it did not do this it would be far easier to lock the back wheel by down shifting too early, something a large cc twin is more than capable of, it is like the rider not completely closing the throttle, I wish I could turn it off in first gear though.

(Message edited by stimbrell on August 22, 2015)
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