Strange clutch problem

Chris Burgess chris at chrisburgess.com
Thu Jul 2 10:29:22 PDT 2009


Its really not a light oil.  0w10...that's a light oil.

Do you use straight 30w then?

On Thu, Jul 2, 2009 at 6:57 AM, KC Gager <kc at brgracing.com> wrote:

> I've not had or seen much luck in longevity with using light oils like
> that.
>
>
>
>
> The Home of A Sickness for Quickness
> K.C.  Owner of BRG Racing Products and Dyno Services
> kc at brgracing.com
> Shop # 925-680-2560
> Toll Free # 1-877-ride-brg
> Address
> 110 2nd Ave South Unit D 12
> Pacheco Ca 94553
>
>
> -----Original Message-----
> From: sv650-bounces at micapeak.com [mailto:sv650-bounces at micapeak.com] On
> Behalf Of Chris Burgess
>  Sent: Wednesday, July 01, 2009 8:00 PM
> To: Suzuki SV650 Mailing List
> Subject: Re: Strange clutch problem
>
> Um that doesn't sound bad.  I run 5w40 in mine.
>
> On Wed, Jul 1, 2009 at 7:36 PM, KC Gager <kc at brgracing.com> wrote:
>
> > 5w30 very light very wrong. Racer did it with out talking to me first.
> > Thing
> > lock up on the starting grid. Had to pull out of the race. Almost cost us
> > the championship for that year
> >
> >
> >
> > The Home of A Sickness for Quickness
> > K.C.  Owner of BRG Racing Products and Dyno Services
> > kc at brgracing.com
> > Shop # 925-680-2560
> > Toll Free # 1-877-ride-brg
> > Address
> > 110 2nd Ave South Unit D 12
> > Pacheco Ca 94553
> >
> >
> > -----Original Message-----
> > From: sv650-bounces at micapeak.com [mailto:sv650-bounces at micapeak.com] On
> >  Behalf Of Chris Burgess
> > Sent: Wednesday, July 01, 2009 7:29 PM
> > To: Suzuki SV650 Mailing List
> > Subject: Re: Strange clutch problem
> >
> > What oil and weight were you running when this happened?
> >
> > On Wed, Jul 1, 2009 at 7:15 PM, KC Gager <kc at brgracing.com> wrote:
> >
> > > Look at the clutch hub washer just under the clutch hub. I think u
> might
> > > find that it's welded to the trany input shaft and the clutch hub.
> > > The cause for us was to light of oil.
> > >
> > > The Home of A Sickness for Quickness
> > > K.C.  Owner of BRG Racing Products and Dyno Services
> > > kc at brgracing.com
> > > Shop # 925-680-2560
> > > Toll Free # 1-877-ride-brg
> > > Address
> > > 110 2nd Ave South Unit D 12
> > > Pacheco Ca 94553
> > >
> > > -----Original Message-----
> > > From: sv650-bounces at micapeak.com [mailto:sv650-bounces at micapeak.com]
> On
> > > Behalf Of Jim Stewart
> > > Sent: Wednesday, July 01, 2009 1:02 PM
> > > To: _SV race list; _SV/DL Riders
> > > Subject: Strange clutch problem
> > >
> > > Hi, guys -
> > >
> > > Last summer on a 3 day ride we had an odd problem first thing in the
> > > morning
> > > of
> > > the second day.
> > >
> > > Ravi's SV 650 had a stuck clutch, just like a British bike. I've never
> > seen
> > > this
> > > before in a Japanese bike. After starting it in neutral and pulling in
> > the
> > > clutch, it wouldn't disengage. Just like my BSA. It had just been
> sitting
> > > overnight.
> > >
> > > I tried to break it loose by pulling in the clutch in second gear and
> > > cranking
> > > the starter, but no good - the starter just pushed the bike across the
> > > parking
> > > lot. Finally I started the engine in neutral, pulled in the clutch,
> > gritted
> > > my
> > > teeth and jammed the shift lever into first. Just like I have to do to
> my
> > > BSA.
> > >
> > > It worked, and the clutch behaved normally thereafter. No problem the
> > next
> > > morning, no problem since then.
> > >
> > > I want to emphasize that this wasn't a cable or linkage problem - the
> > > clutch
> > >
> > > felt normal when I pulled on the lever. But the plates were stuck
> > together
> > > even
> > > though the spring pressure was removed.
> > >
> > > In a few days the bike's coming out to my place for a clutch
> inspection,
> > > but
> > > I'm
> > > not inclined to replace the friction plates in a working clutch on a
> > > low-mileage
> > > bike. Unless, of course, we find something wrong.
> > >
> > > Anyone else had this problem on an SV? Or any other modern bike?
> > >
> > > Suggestions welcome!
> > >
> > > ------------------
> > >
> > >
> > > Here's my response to Ravi:
> > >
> > >
> > >  > Ravi wrote:
> > >  >> what exactly do you want me to buy?
> > >  >> Also, where should I buy it from that you recommend?
> > >  >>
> > >
> > > I wrote:
> > >  >
> > >  > That's a tough question.
> > >  >
> > >  > Am I correct that your clutch had never stuck before, and that it
> > hasn't
> > >  > since?
> > >  >
> > >  > A sticking clutch that has to be broken loose with a shock is common
> > on
> > >  > Brit bikes, and it's caused by a poor choice of friction material in
> > the
> > >  > clutch plates or a poor choice of oil. Or both. But with a Brit bike
> > the
> > >  > problem would typically occur after the bike had been sitting for a
> > >  > while, several days or more. Not overnight, as in your case. And it
> > >  > wouldn't go away after one episode.
> > >  >
> > >  > Furthermore, I've never heard of this problem with any Japanese
> bike,
> > >  > old or new.
> > >  >
> > >  > Since the clutch operates in oil, sticking can be caused by either
> the
> > >  > friction plates or the oil - do you recall what brand/weight oil you
> > >  > were running last summer? In the absence of any other data, I'm
> > inclined
> > >  > to think the problem was oil related.
> > >  >
> > >  > Beth mentioned notched splines in the clutch basket, a problem she
> has
> > >  > on her SV, but that wouldn't cause your problem - notches cause the
> > >  > clutch to grab suddenly when engaging, but don't cause problems
> > >  > disengaging.
> > >  >
> > >  > My inclination is to inspect the clutch first - in which case all
> > we'll
> > >  > need is a new O-ring for the clutch cover. But if you want we could
> > >  > replace the friction plates anyway. It won't take any longer, since
> > >  > we'll already have them out, but it'd be a stab in the dark at an
> > extra
> > >  > $110 or so.
> > >  >
> > >  > I recommend Ron Ayers: http://fiche.ronayers.com/ Check out the
> > clutch
> > >  > fiche for your bike: http://tinyurl.com/m2d66t
> > >  >
> > >  > Note that the drawing is incorrect - it shows a total of 8 friction
> > >  > plates (the ones with the tabs on the outer edge), 7 is the correct
> > >  > count. There are 6 of 21441-37440 @ 13.28 each and one of
> 21440-19F00
> > @
> > >  > $31.24. The steel plates between them don't wear - with extreme
> abuse
> > >  > they will warp, causing drag on disengagement (not your problem).
> > >  >
> > >  > You will need the large O-ring for the cover, 11484-19F01, $11.18.
> > >  > http://tinyurl.com/l7h5df
> > >  > It's *possible* that the dealer would have this in stock. If they
> > stock
> > >  > anything at all anymore.
> > >  >
> > >  > ----------------
> > >  >
> > >  > This would be the appropriate time to change your oil, since we'll
> > need
> > >  > to drain it to work on the clutch. Unless you've just done that, in
> > >  > which case we can put it back. Or work on the clutch with the bike
> on
> > >  > the sidestand.
> > >  >
> > >  >
> > >  > -js
> > >  >
> > >
> > >
> > >
> >
> >
> > --
> > WERA #104
> > OMRRA #104
> > WMRRA #104
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> >
> > 2009 Sponsors
> > I-90 Motorsports
> > Vortex Racing - http://www.vortexracing.com
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> >
> >
>
>
> --
> WERA #104
> OMRRA #104
> WMRRA #104
> http://www.burgiracing.com
> http://www.sponsorhouse.com/members/thatman
>
> 2009 Sponsors
> I-90 Motorsports
> Vortex Racing - http://www.vortexracing.com
> Motorex - http://www.motorex.com
> Leo Vince - http://www.leovinceusa.com
> Lockhart Phillips http://www.lockhartphillipsusa.com
>
>


-- 
WERA #104
OMRRA #104
WMRRA #104
http://www.burgiracing.com
http://www.sponsorhouse.com/members/thatman

2009 Sponsors
I-90 Motorsports
Vortex Racing - http://www.vortexracing.com
Motorex - http://www.motorex.com
Leo Vince - http://www.leovinceusa.com
Lockhart Phillips http://www.lockhartphillipsusa.com


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