Stock clutch is on its last legs

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hondaror
Posts: 2828
Joined: Mon Mar 03, 2014 8:44 pm
Location: Alberta, Canada

Stock clutch is on its last legs

#16 Post by hondaror » Wed Feb 15, 2017 2:44 am

If you can't afford a set of springs, you can't afford to ride. They are not expensive.

Blue plates are over heated and distorted, out of spec.

Washers are added unnecessary parts, in a moving clutch. Just pretend they split, (Chinese) crappy steel. Where do they go? What damage do they do with a rotating mass in a confined area?

You don't need a micrometer to measure plates, vernier is fine. Steels have to be checked for warpage on a sheet of glass or a flat plate.
Rory
2 1984 RZ350s
1985 RZ350
9 1986-1990 RZ350s
2000 ST2
2005 749
2005 749 with 999 engine

Bloke
Posts: 21
Joined: Fri Jul 29, 2016 12:44 pm

Re: Stock clutch is on its last legs

#17 Post by Bloke » Sat May 06, 2017 9:50 pm

new springs, fresh oil, still slipping, so who has clutch kits stateside?

yamasukiman
Posts: 104
Joined: Tue Dec 06, 2011 7:13 am
Location: West Aust

Re: Stock clutch is on its last legs

#18 Post by yamasukiman » Sun May 07, 2017 6:10 am

Does your clutch basket have grooves in it?
The plates settle into these and you need a smooth surface on those faces.
Otherwise all the other remedies won't fix anything.

Hooligan
Posts: 1966
Joined: Mon Aug 20, 2012 1:37 am
Location: Calgary, Alberta

Re: Stock clutch is on its last legs

#19 Post by Hooligan » Sun May 07, 2017 6:14 pm

Bare wrote:Frictions are cheapish.
Worn out ones measure at Very little less than Brand new ones.
Fitting larger Yamaha friction discs is a No brainer imo ..30% more friction area.
Which hold lots mo' power and even wear less.
What's not to like ?
One also gets to trashbin those worthless rubber damper rings Yama fitted for a few model years.
IF convinced that the pore springs are knackered (I remain skeptical that they often are)..
Measure 'em and if so a simple corrective bodge would be to fit a washer under them.

That will increase the spring preload, without Effing up the clutch feel.
.
I'd be very careful about fitting washers under the springs. When I measured up the springs, they are essentially fully compressed when the clutch is disengaged. Fitting washers could prevent the clutch from completely disengaging when the lever is pulled.
'82 RD350LC in '81 colours, OEM pipes, UNI filters
'85 FZ750

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