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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through January 24, 2011 » Clutch drag when not running « Previous Next »

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Sprintst
Posted on Thursday, January 13, 2011 - 12:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm sure every question imaginable has already been asked, but I'm a noob to Buells, and the search engine on this board leaves a bit to be desired..........


Had a slightly dead battery when I got this bike, and was thinking of trying a bump start. I noticed that in any gear, with the engine not running, there is significant clutch drag, with the lever pulled all the way in.

I'm assuming this is related to the power assist clutch and is normal. No issues when in neutral, and everything works fine when the engine is running.


So, engine off, bike in gear, clutch pulled in, bike hard to push?
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Bigevildoer
Posted on Thursday, January 13, 2011 - 12:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So, engine off, bike in gear, clutch pulled in, bike hard to push?



Simply put, yes.
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Vinb
Posted on Thursday, January 13, 2011 - 12:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It just oil drag
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Sprintst
Posted on Thursday, January 13, 2011 - 12:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

feels a lot stronger than oil drag, bike is hard to push in 4th even
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Skntpig
Posted on Thursday, January 13, 2011 - 12:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Normal for every bike I have seen. Put it in neutral and only click it into Second gear when you need to. Good luck. I tried to bump start mine with 2 people pushing and couldn't that's quite a lump to turn over.
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Vinb
Posted on Thursday, January 13, 2011 - 12:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That they are. But oil drag is what I've bin told on here and I believe it.
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Sprintst
Posted on Thursday, January 13, 2011 - 12:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Great to hear it's normal, thanks all.
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Vinb
Posted on Thursday, January 13, 2011 - 12:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sprintst on a side note hows the blue ridge I'm thinking of riding down there this summer.
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Sprintst
Posted on Thursday, January 13, 2011 - 02:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did a little of it while on a ride out by Ashville, NC. Very scenic, but get off the blue ridge for some fun.

We've got some great roads out there, look as good as the Dragon videos I've seen, and a lot less police
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Jdugger
Posted on Thursday, January 13, 2011 - 03:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ever had two wet plates and tried to separate them?

If you ever take a clutch apart it will be plainly obvious why at motor-off-and-push speeds pulling in the clutch on a cold motor wouldn't necessarily make a bike much easier to push at all.

Neutral is the answer.
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Sprintst
Posted on Thursday, January 13, 2011 - 05:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes, I have, and they aren't easy to separate.

However, every other motorcycle I've ever owned didn't do this, but they also didn't have assisted clutches.
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Jdugger
Posted on Thursday, January 13, 2011 - 05:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's not related. The assist helps with force to make lever pull easier, that's all. The diaphram is on the outside of the clutch pack, and just acts as "an extra finger's force" against the slave cyl.

Inside the clutch, pulling the lever gives the plates the ability to separate, but not necessarily the desire. A thin layer of cold oil would leave them very much stuck together.
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Sprintst
Posted on Thursday, January 13, 2011 - 05:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Was/is frigid cold too........


Okay, back to back 1st gear, in a garage - Sprint had fair amount of drag too, Buell just had more

(Message edited by sprintst on January 13, 2011)
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Jdugger
Posted on Thursday, January 13, 2011 - 05:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also, the assisted clutch doesn't do much at idle.

Frankly, it only really does anything at all when in heavy engine braking situations.

Try this:

Go find a long, slow grade hill. Ride up the hill on the gas, and pull the clutch lever in and out a few times. Note the amount of force required to pull the lever.

Now, on the backside of that hill with some speed, cut the throttle. Pull the clutch lever in and out a few times. Note the force required. Get back on the gas do it again.

What do you notice?
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Jdugger
Posted on Thursday, January 13, 2011 - 05:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also, keep in mind the 1125r's clutch pack is 9 frictions and 10 steels, I think.

A smaller (less powerful) bike would have a smaller clutch pack and less drag.
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