Mk2 850 Clutch slipping

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Dedubyah

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I've just taken apart the clutch on my 850 as it was slipping badly and saw these crosshatch marks on the bronze plates, which I've not noticed on pics of other plates. All plates measure between 0.124-0.125, 3 of the steels are 2mm and one is 3mm. I'm going to give them a good clean and install with ATF, any thoughts on these plates?
Mk2 850 Clutch slipping
 
Some people swear that these original bronze plates are lifetime. I’m sure they are. I got tired of removing and cleaning them, and still having clutch slippage at WOT. I’ve scrubbed and soaked with all sorts of cleansers, and have a clutch rod device to keep tranny oil out of the primary. They still slipped at WOT.
I’ve inspected and adjusted stack height, adjusted cable lengths and prayed. I applaude those of you who enjoy the scintered bronze clutch plates.
I have had no issues with Barnett plates.
 
Do you have a bit of wear on your plates as my mk3 manual gives a figure .142-.148, I replaced my steel and bronze plates a few years ago [they are still in good condition and with a pushrod seal] I have tried a 3mm plate but found the clutch slipped worse with the 3mm fitted so after several strips and cleans I removed the 3mm plate and went back to standard the slip has gone away though I remove and clen them when I do a service.
 
Some previous owner had a go-to on your sintered bronze plates , in a previous life . Never seen that though .
I mix and match other brands of plates without worries , to achieve a good stack height and the ultimate goal , a sweeter clutch pull without slip .
 
If all clutch plates are absolutely flat and not dished at all, and it still slips, then install a Barnett set from CNW and you will have no more problems. A slipping clutch will overheat the steel plates and they will end up dished, causing worse slipping. Graham
 
Dedubyah said:
I've just taken apart the clutch on my 850 as it was slipping badly and saw these crosshatch marks on the bronze plates, which I've not noticed on pics of other plates. All plates measure between 0.124-0.125, 3 of the steels are 2mm and one is 3mm. I'm going to give them a good clean and install with ATF, any thoughts on these plates?
View attachment 124848
Click to expand...
Thats the normal finish on original bronze plates. You can convert std bronze plates to High torque versions by turning off the bronze from the center, reducing the width of the surface by 6mm or so, this moves the center of pressure outwards slightly and cut radial grooves into the surface (so it looks like postage stamps)
This is basically what the high torque plates are from AN and RGM
 
I bought some high torque plates from RGM. They look good and well made.

But, compared to Barnets, they weigh a ton. The high torque plate kit is therefore still sat on the shelf and the Barnets are still in both bikes !
 
Fast Eddie said:
I bought some high torque plates from RGM. They look good and well made.

But, compared to Barnets, they weigh a ton. The high torque plate kit is therefore still sat on the shelf and the Barnets are still in both bikes !
Click to expand...
If they're heavy, that's got to be hard on the clutch centre! I like my Barnets. 👍
 

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