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Post by looey on Feb 6, 2015 19:09:37 GMT 1
Chaps
Anyone know if there's a "Service Limit" Dimension for YPVS Clutch Springs ?.
Haynes only quotes "Free Length"
Ta
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Post by midlifecrisisrd on Feb 6, 2015 22:37:42 GMT 1
Chaps Anyone know if there's a "Service Limit" Dimension for YPVS Clutch Springs ?. Haynes only quotes "Free Length" Ta Anything significantly under the free length is questionable. Cheap enough part to change regardless Steve |
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Post by Tone on Feb 6, 2015 22:43:27 GMT 1
In the Genuine Yamaha workshop manual for the LC2 it say's length New 36.4mm and Limit 34.4mm.
Tone
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Post by looey on Feb 6, 2015 22:44:51 GMT 1
Yeah I think I will fit new anyway. It's already bankrupt me, what's a few more £££   Been reading though all the historical posts re: spring types to fit in tuned YPVS engines.......... Some saying 6x H/D will make the clutch too heavy, some saying 3x standard + 3x TZ is the best mix, some saying 6x standard will take anything you can get from a 350 YPVS ?. Decisions, decisions..........   |
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Post by midlifecrisisrd on Feb 6, 2015 23:04:40 GMT 1
Yeah I think I will fit new anyway. It's already bankrupt me, what's a few more £££ Been reading though all the historical posts re: spring types to fit in tuned YPVS engines.......... Some saying 6x H/D will make the clutch too heavy, some saying 3x standard + 3x TZ is the best mix, some saying 6x standard will take anything you can get from a 350 YPVS ?. Decisions, decisions.......... Fitted 6 genuine in my 385 and it still slipped. 6 to too stiff 3 X tz and 3 gen fine once heated up Steve |
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Post by looey on Feb 6, 2015 23:08:59 GMT 1
Yeah I think I will fit new anyway. It's already bankrupt me, what's a few more £££ Been reading though all the historical posts re: spring types to fit in tuned YPVS engines.......... Some saying 6x H/D will make the clutch too heavy, some saying 3x standard + 3x TZ is the best mix, some saying 6x standard will take anything you can get from a 350 YPVS ?. Decisions, decisions.......... Fitted 6 genuine in my 385 and it still slipped. 6 to too stiff 3 X tz and 3 gen fine once heated up Steve Yeah 3x Gen & 3x TZ is the way to go I think........NORBO !!!!!!!! Oh and thanks Tone for the Info., I'll add it to me Haynes  |
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Post by 4l04ever on Feb 6, 2015 23:23:32 GMT 1
6 of the EBC uprated springs work well on my LC. Cheaper to buy them as Aprilia RS125 springs :-) CSK002 is the part number.
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Post by bare on Feb 7, 2015 2:09:16 GMT 1
Stock springs are Fine.
Suggest retrofitting the FZ600 thru to R6 Friction plates, ~30% larger and More than up to the demands of a Tuned 350.
Light clutch lever feel/action is one of the Best things about a Yama 350 valvie.
Don't mess it up without genuine reason.
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Post by JonW on Feb 7, 2015 12:17:02 GMT 1
Almost always the plates are fine and its the springs that have gone in our clutches, 3HD + 3STD is the knowledge.
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Post by looey on Feb 7, 2015 12:29:06 GMT 1
Yeah I take the point re: the FZ plates and standard springs and keeping the clutch light etc. and if I were changing the complete clutch that's probably the way I'd go.
It wasn't slipping before it was stripped and the platess are well within their serivce limit but the springs are outside their's, so I just want to replace them.
Sounds like the 3 + 3 is the way to go in this case
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Post by midlifecrisisrd on Feb 7, 2015 12:30:46 GMT 1
Yeah I take the point re: the FZ plates and standard springs and keeping the clutch light etc. and if I were changing the complete clutch that's probably the way I'd go. It wasn't slipping before it was stripped and the platess are well within their serivce limit but the springs are outside their's, so I just want to replace them. Sounds like the 3 + 3 is the way to go in this case I used the thicker plates Still bloody slipped Steve |
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Post by looey on Feb 7, 2015 12:37:21 GMT 1
I didn't build the engine before, so I've no idea what's just been taken out  I'm hoping/assuming that as mine wasn't slipping before, re-assembling with new springs should only improve it. |
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Post by Deleted on Feb 7, 2015 14:52:19 GMT 1
what do the fingers on the clutch basket look like have they rows of concentric lines? if so basket is pooped as well
If you are going down the road of new springs like I did I'd be changing the plates and friction rings as well
I fitted 15% stronger springs I don't really feel the clutch is that heavy at least for me, I guess its personal opinion/choice though
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Post by gibba1008 on Feb 7, 2015 19:44:32 GMT 1
Carefully flatten off the ridges and away you go....
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