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New clutch slip

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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 10:02 - 01 Feb 2011    Post subject: New clutch slip Reply with quote
I've had the clutch changed on my CBR600F6.
It wasn't done by Honda but it was a mechanic's shop in London.

Since it's been changed, it slips when I clutch-up in 2nd. If I even brush passed the lever when I'm gunning it, it'll slip too.

The mechanic said the clutch needed to be bedded-in before I could start pulling wheelies with it. So I took it easy for a few hundred miles but it's still the same. It's a genuine Honda part FYI.

I've left a bit of slack on the clutch lever so I know it's not that.

Any Ideas what the issue is?
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Kickstart
The Oracle



Joined: 04 Feb 2002
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PostPosted: 12:09 - 01 Feb 2011    Post subject: Reply with quote
Hi

What condition is the clutch cable in and is it routed properly?

All the best

Keith
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 12:42 - 01 Feb 2011    Post subject: Reply with quote
Kickstart wrote:
Hi

What condition is the clutch cable in and is it routed properly?

All the best

Keith



The cable is new and I can't see it wedged anywhere Smile
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Rockhopper
Trackday Trickster



Joined: 18 Jun 2006
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PostPosted: 13:20 - 01 Feb 2011    Post subject: Reply with quote
Did they soak the new plates in oil before fitting them?
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Kickstart
The Oracle



Joined: 04 Feb 2002
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PostPosted: 13:27 - 01 Feb 2011    Post subject: Reply with quote
Hi

Afraid all I can suggest is taking it apart and checking it carefully. Check the springs haven't compressed too much (unlikely I suspect), that the plates are the correct thickness and assembled in the right order (if there is one on the CBR, some bike have an odd plate that goes in a particular position), that the clutch basket isn't badly notched and that everything is sliding smoothly.

With it slipping after yo have used it, it does sound like the clutch is taking time to seat again after being used. Does it slip if you find a steep hill and accelerate hard up in in a high gear with the revs at peak torque (not peak power), if you haven't used the clutch for a few minutes?

All the best

Keith
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Ichy
World Chat Champion



Joined: 15 Jul 2005
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PostPosted: 13:27 - 01 Feb 2011    Post subject: Reply with quote
Do you know what oil was used when they put it back together?
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 13:39 - 01 Feb 2011    Post subject: Reply with quote
Rockhopper wrote:
Did they soak the new plates in oil before fitting them?


I was thinking that myself. If they didn't, would it serve any purpose now, seeing as the clutch has been in for over a month and has several hundred miles on it?
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 13:48 - 01 Feb 2011    Post subject: Reply with quote
Kickstart wrote:
Hi

Afraid all I can suggest is taking it apart and checking it carefully. Check the springs haven't compressed too much (unlikely I suspect), that the plates are the correct thickness and assembled in the right order (if there is one on the CBR, some bike have an odd plate that goes in a particular position), that the clutch basket isn't badly notched and that everything is sliding smoothly.

With it slipping after yo have used it, it does sound like the clutch is taking time to seat again after being used. Does it slip if you find a steep hill and accelerate hard up in in a high gear with the revs at peak torque (not peak power), if you haven't used the clutch for a few minutes?

All the best

Keith



Hi Keith,

It will *only* slip on the occasion I try a 2nd+ gear clutch-up wheelie, or I'm gunning hard at 12k+ RPM in 3rd or 4th (all top torque stuff).
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DrDonnyBrago
World Chat Champion



Joined: 03 Jan 2010
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PostPosted: 13:52 - 01 Feb 2011    Post subject: Reply with quote
Probably quite unlikely but...

The older FI CBRs (2001-2002) had one less clutch plate than the newer versions F3+ and the FS1 and FS2 sport. I am under the impression that many of the clutch components are shared between the models so potentially a clutch kit from an older bike with fewer plates might fit into a newer bike clutch basket but leave a bit of slack not taken up by the newer bike springs.


Just a thought really but could be worth looking into if other avenues hit a wall.
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 13:52 - 01 Feb 2011    Post subject: Reply with quote
Marki wrote:
Do you know what oil was used when they put it back together?


I don't, no.
I would have thought it would be stock oil that the garage uses. As its a London garage, probably mostly used by couriers who don't give a fcuk what goes in it, as long as its cheap, perhaps that's the issue?

Is it possible to drain the bike, take all the plates out, give'em a clean and refill with decent oil? or is it a case of "horse-door & bolted" now?
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chillyman0
Nearly there...



Joined: 11 Sep 2008
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PostPosted: 13:54 - 01 Feb 2011    Post subject: Reply with quote
What was replaced? plates and springs or just plates? Could be that the springs are old and shagged.
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DrDonnyBrago
World Chat Champion



Joined: 03 Jan 2010
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PostPosted: 13:56 - 01 Feb 2011    Post subject: Reply with quote
But.It.Was.A.Bargain.Luv wrote:
Marki wrote:
Do you know what oil was used when they put it back together?


I don't, no.
I would have thought it would be stock oil that the garage uses. As its a London garage, probably mostly used by couriers who don't give a fcuk what goes in it, as long as its cheap, perhaps that's the issue?

Is it possible to drain the bike, take all the plates out, give'em a clean and refill with decent oil? or is it a case of "horse-door & bolted" now?


Getting the clutch out isn't a big job. Doing it just to play with the oil wouldn't help though as the wet clutch would have been bathed in your engine oil for X number of miles anyway. Still may be worth getting it apart for the reasons Keith suggested.

What engine oil is in there?

Is it some car stuff with loads of friction modifiers?
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 13:59 - 01 Feb 2011    Post subject: Reply with quote
chillyman0 wrote:
What was replaced? plates and springs or just plates? Could be that the springs are old and shagged.


Yeah could be Exclamation

The bikes done over 44k now. I'll keep that one in mind, cheers!
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 14:02 - 01 Feb 2011    Post subject: Reply with quote
DonnyBrago wrote:
Probably quite unlikely but...

The older FI CBRs (2001-2002) had one less clutch plate than the newer versions F3+ and the FS1 and FS2 sport. I am under the impression that many of the clutch components are shared between the models so potentially a clutch kit from an older bike with fewer plates might fit into a newer bike clutch basket but leave a bit of slack not taken up by the newer bike springs.


Just a thought really but could be worth looking into if other avenues hit a wall.


Cheers, I'll keep that in mind too. Next thing is to get it open and have a look.
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Kickstart
The Oracle



Joined: 04 Feb 2002
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PostPosted: 14:05 - 01 Feb 2011    Post subject: Reply with quote
But.It.Was.A.Bargain.Luv wrote:

It will *only* slip on the occasion I try a 2nd+ gear clutch-up wheelie, or I'm gunning hard at 12k+ RPM in 3rd or 4th (all top torque stuff).


Peak torque is probably at a lot lower rpm. It is torque rather than power than stresses the clutch (just that at higher speeds you have more wind resistance to push against).

Reason for suggesting trying a steep hill in a high gear at peak torque is that will put the most stress on the clutch. If it will slip for anything it will slip then. If you can do this without having used the clutch for a bit then it will give you some idea if it is the clutch taking ages to seat (ie, what would happen if the cable is old, but also other things).

All the best

Keith
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But.It.Was.A.Bargain.Luv
Derestricted Danger



Joined: 28 Oct 2010
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PostPosted: 14:06 - 01 Feb 2011    Post subject: Reply with quote
DonnyBrago wrote:

What engine oil is in there?

Is it some car stuff with loads of friction modifiers?


Just don't know unfortunately. Its a bike garage, so would assume they used bike oil though.
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