Kosmo
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 posted on 14/3/09 at 08:59 PM |
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HELP - R1 Clutch Slip ! - NOW SORTED :-)
Well, I had my 1st drive today but it did not go to plan, Lots and lots of clutch slip !
I'm using 10/40 part synthetic oil and the level is OK. (Not sure if it has had fully synthetic in the past) Clutch arm adjustment is also
OK.
What do I check next... Do I need to upgrade the clutch or clutch springs ?
Cheers,
Kosmo.
[Edited on 15/3/09 by Kosmo]
[Edited on 15/3/09 by Kosmo]
[Edited on 22/3/09 by Kosmo]
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r1_pete
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| posted on 14/3/09 at 09:02 PM |
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Have you used bike oil? the additives in car oil are not compatible with bike wet clutches, and cause slip, even the friction linings to part with the
backing.
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001Ben
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| posted on 14/3/09 at 09:06 PM |
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Assuming eveything is working ok with the operation of the clutch I would suggest changing the clutch plates as I had a similar problem with mine.
Since changing them ( thanks Paul ) I have not had any more problems. From various reviews stick with Yamaha plates as they seem to be better than
alternative suppliers.
[Edited on 14/3/09 by 001Ben]
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001Ben
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| posted on 14/3/09 at 09:08 PM |
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have you fitted barnett springs ?
[Edited on 14/3/09 by 001Ben]
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locoR1
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| posted on 14/3/09 at 09:08 PM |
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As said by r1_pete if you've used car oil that's your problem.
 
Description
Check out my CB500T Cafe Racer build diary
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A1
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| posted on 14/3/09 at 09:47 PM |
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is your clutch arm properly aligned with the wee dot?? ie you sure its properly engageing?
you dont need to upgrade the springs for it to work okay.
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Kosmo
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| posted on 14/3/09 at 10:06 PM |
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Oil is Halfords bike 10/40 part synthetic.... Standard clutch and springs installed I believe as the engine came from Malc at Yorkshire engines with
about 3000 mile on the clock.
The orientation of the arm is the not the same as installed in the bike, I have rotated about 90 degrees, I believe other people have done this to
without a problem but I'm open to suggestions.
If I have to change clutch plates what do I need, just the friction plates ?
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BenB
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| posted on 15/3/09 at 01:22 AM |
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Okay so it's bike oil.
Some bike clutches don't like fully synthetic and slip unless you use semi.
Other than that it's time to whip open the clutch and measure the thickness of the clutch pack and the clutch springs. If in doubt replace the
friction rings (the plain metals should be okay)....
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Paul TigerB6
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| posted on 15/3/09 at 01:57 AM |
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Standard single Yamaha spring?? - i am not surprised it slips to be honest. As Ben says, standard Yamaha plates are best but the standard spring
pressure simply isnt enough. We fitted the Barnett conversion to Ben's car and still it slipped on the RR with the standard Barnett springs (6
of them!!). Now have 3 of the race springs in there along with new clutch plates and all seems good so far!! Rolling road will tell.
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Kosmo
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| posted on 15/3/09 at 08:41 AM |
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OK, so if I have to replace the clutch plates what type do you suggest, Yamaha or aftermarket ?
What are race springs and where can I get them ? Also, why only 3 ?
What about a full Barnett clutch system ?
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amalyos
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| posted on 15/3/09 at 09:37 AM |
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I've been using standard Yamaha clutch plates with 2 standard springs for 2 years, with no problems.
Done loads of track days.
Take it easy of the line, this helps.
http://stevembuild.blogspot.com
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Kosmo
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| posted on 15/3/09 at 10:51 AM |
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Is there any reason why I cant fit washers to the standard springs as a test ?
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Kosmo
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| posted on 15/3/09 at 11:40 AM |
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I think I found the problem, just removed all the clutch plates, only 1 of the friction plates are withing the tollerance detailed in the service
manual (2.9 - 3.1mm) Most are between 2.4 - 2.6mm.
Looks like I will need new friction plates... next quection is what do most people use ? There seems to be some differance of opinion.
Cheers,
Kosmo.
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Paul TigerB6
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| posted on 15/3/09 at 04:42 PM |
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Definately standard Yamaha plates. Worth getting a second spring also to double up as above which is a considerably cheaper option than the Barnett
conversion, which replaces the pressure plate and has a ring of 6 springs (they supply two sets of springs with different rates) to increase the
pressure acting on the clutch plates.
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Kosmo
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| posted on 15/3/09 at 06:53 PM |
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Not sure what you mean by 2nd spring...?The 5VY allready has the 6 spring set-up, I think the earlier R1's had the single center spring.
So should I use Barnett or Standard ?
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Paul TigerB6
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| posted on 15/3/09 at 08:44 PM |
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Ah sorry - didnt see you had the later 5vy in your profile on the left there.
Just go for the uprated springs then - they arent exactly dear.
linky
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dean100yz
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| posted on 17/3/09 at 08:22 AM |
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Just my 5 pence worth but id stick with geniune. I have used EBC and SBS and found both are good but dont last as long.
Again the semi synth bike oil is real important but you already sorted that 
I always replace the complete clutch not just the friction plates. Is any of the discs blue/purple or very dark in colour?
Lastly again just from learning the hard way myself Id change the springs. Uprated ones Id have thought were fine as your not going to notice it being
much stiffer as you use you foot not your hand!
On my blade the basket has started wearing notches so at some point ill have to uprate it
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Kosmo
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| posted on 22/3/09 at 06:46 PM |
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New Yamaha friction plates fitted with Barnett Springs, Now working great with no slip....
Thanks for all the advice
Kosmo :-)
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