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Clutch Disks Brand (Read 2 times)
Reelthing
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Re: Clutch Disks Brand
Reply #15 - 12/05/05 at 13:17:14
 
mic all the drive and driven plates if you have time
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torque
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Re: Clutch Disks Brand
Reply #16 - 12/05/05 at 18:22:37
 
ok i found out that my dad does have a mic,the old drive (friction)plate is 137 thousandths,and the driven plate is 64 thousandths .
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Reelthing
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Re: Clutch Disks Brand
Reply #17 - 12/05/05 at 18:38:53
 
can you measure the preasure springs - the service limt is 1.30" 130 thousandths
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torque
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Re: Clutch Disks Brand
Reply #18 - 12/05/05 at 18:42:58
 
they are 135 tousandths, not worn much at all.
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Reelthing
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Re: Clutch Disks Brand
Reply #19 - 12/05/05 at 18:44:40
 
torque wrote on 12/31/69 at 16:00:12:
ok i found out that my dad does have a mic,the old drive (friction)plate is 137 thousandths,and the driven plate is 64 thousandths .


by the way .137 is still with in the service specs for plate #2 almost new in fact - how about the thinner plate #1 ?
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torque
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Re: Clutch Disks Brand
Reply #20 - 12/05/05 at 18:49:59
 
i'm sitting in the dark, trying too stay awake ,i'll measure everything tomarow.

i trully dont know what plate i grabbed Embarrassed
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Reelthing
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Re: Clutch Disks Brand
Reply #21 - 12/05/05 at 18:59:21
 
torque wrote on 12/31/69 at 16:00:12:
they are 135 tousandths, not worn much at all.


Wonder if they are down on their "elastic strength" - service manual suggests you can infer this from their length -

I'm not so sure about that - so in comes Slavy's preload washers - that maybe all we need to do to these clutches that are just slip'n a little
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bentwheel
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Re: Clutch Disks Brand
Reply #22 - 12/05/05 at 19:34:07
 
Here are my clutch plate measurements.
Friction plate #2 (thick one)        0.146"
Friction plate #1                          0.119"
Steel plate                                   0.062"
Springs                                         1.378"

All of these values fall well within the standard range and are not within Suzuki's replacement range yet the clutch does not operate properly. BTW the fingers on the clutch basket were only notched slightly but I filed them flat.
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1977 Yamaha XS360
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Reelthing
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Re: Clutch Disks Brand
Reply #23 - 12/05/05 at 19:40:33
 
I may just pull the cover shim up the springs and see what happens
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bentwheel
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Re: Clutch Disks Brand
Reply #24 - 12/05/05 at 19:56:29
 
I would like to see everyone who takes their clutch apart, to post their plate and spring measurements here to see if in fact our clutch is failing with good spec plates or not. Perhaps the problem is not plate related but a different clutch delivery culprit. Maybe the recommended springs are too weak. The only other anomaly I discovered on the dis assembly was the clutch nut was hand tight only (about 1 ft. lb. torque). Thank goodness the retaining washer held. I have to assume the previous owner is responsible, but I do ask others to determine the torque prior to removal. It should be 36-50 ft. lb. of torque. I doubt this is a common problem but we can eliminate this one quickly if we can get a few more responses.
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bentwheel
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Re: Clutch Disks Brand
Reply #25 - 12/05/05 at 20:08:17
 
Reelthing wrote on 12/31/69 at 16:00:12:
I may just pull the cover shim up the springs and see what happens


Yes, that would be a good test. I would do the same but I think the snow is here to stay. Slavy also confirms this theory so I will be curious to see how you make out, especially in the long term.
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torque
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Re: Clutch Disks Brand
Reply #26 - 12/06/05 at 17:28:01
 
ok here it is

friction plate#2= 3.5mm

friction plate #1=3.0mm

claw width#2=16 mm

claw width#1=16 mm

its really strange because they are all way in side the service specs.i believe the heat glazes the plates making them very hard and glassy,and the heat also weakens the springs,imo Undecided
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Reelthing
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Re: Clutch Disks Brand
Reply #27 - 12/15/05 at 16:53:35
 
Ok the parts came in today - if I can get to it this weekend - going to replace the cam chain, tensioner, rear chain guide, while im there ... I ordered in new clutch springs - going to replace these and add preload washers - and leave the clutch plates alone - going to be hard to leave along as I managed to get a NOS basket for $25.
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bentwheel
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Re: Clutch Disks Brand
Reply #28 - 01/01/06 at 17:39:47
 
I am still waiting on a replacement pressure plate before I can reassemble the clutch, so I measured the new Barnett plates. Guess what? They are the same thickness as the old plates I am replacing. I knew the old plates were still within normal ranges but I expected new plates would stop the slipping. Maybe so, but I now highly suspect plate wear is not an issue for the Savage, with the real culprit being insufficient spring tension on the clutch pack. Another thing that surprised me was the free play in the clutch basket when all the plates are inserted. There is easily room for one more friction disc and possibly another steel one as well. Rather than put in extra plates this time, I will preload the springs with washers I have made up.
The replacement Barnett springs are 2mm longer than the old ones but use a slightly thinner coil.
BTW I am replacing my pressure plate because I found cracks in the boss right where it attaches to the plate. I doubt this has anything to do with the slipping problems of the clutch plates . I am changing it now for reliability reasons.
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Bentwheel FSO
2006 Suzuki 650 V-Strom
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Tim Krantz
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Re: Clutch Disks Brand
Reply #29 - 01/04/06 at 22:08:02
 
Don't know if this will help or not, but I was having a wail of a tme keeping A RD400 Yamaha's clutch from slippng after doing some engine mods. I miked the steel and fibre plates,and all was well within specs, did the shims,as suggested on another site, but the slippage continued. This was during heavy acceleration at drag strips. Finally I took a tip on another site and swapped 3 of the 6 pressure springs out of a factory roadracing model, and the problem was cured, with just a little more effort at the clutch handle. It seems to me(and I've been wrong about things,more than right) that shimming doesn't put more pressure on the plates, unless the springs are progressive rate springs, hence the shimming didn't work?????? Anyhow, maybe alternative springs may be the answer????
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