RGM high torque clutch plates feedback

Fast Eddie

Fast Eddie

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Anyone used the RGM bronze high torque clutch plates in a dry set up?

Do they grip any better than other types when used dry?

I’m trying to cure some high rpm slippage on a ‘healthy’ 1007 motor and am looking for good options.
 
The slippage cure might be to reduce the thickness of the whole stack.

When I got my 850, the clutch handle pull pressure was quite high but I did not realize it as the bike was new to me.
But I did decide to go from stock bronze to surflex plates and, when I, did I measured the surflex
compared to the old plates (I forget exactly) there was perhaps 15 thou of wear on each bronze plate
compared to the surflex.
I installed the surflex which increased the stack thickness and the clutch handle pull pressure was much reduced.
So I would think that if you do the opposite of what I did and reduce the stack thickness, you will shift the use of diaphragm spring to the part needing more pressure. What do you have in there now and are they new or worn?
Dennis
 
What type of clutch plates are you using? To make the bronze plates grip better you can machine about .250" from the friction surface inner dia so moving the center of pressure outwards. at the same time cut radial grooves, like the rgm plates to help keep the oil off the plates Also, if you can, increase the engine sprocket diameter to speed up the gearbox, getting back to the required overall gearing by reducing the gearbox sprocket accordingly.
 
This is probably offensive, but I excel at offensive. :)

Might be a good idea to ask specifically for feedback from 1007 owners with the same or nearly the same type of engine components. An 850 is probably a few HP down on a 1007.
 
After putting my 850 back together with stock plates and new steel plates I would experience slip WOT in 3rd and 4th gears. Clutch stack adjusted correctly. I installed the RGM plates, no slippage at all. Ran like a rocket ship. I can't attest to running them dry. They were $150 USD at the time and well worth the $$$
 
I ran the stock bronze clutch plates with a dry belt dive for 3 years without any slippage at all but the clutch did grab a bit quicker when releasing the lever, not sure if the RGM HT plates be the same with quick grab.
 
I used bronze plates one season & they never slipped. However they came in with a bang. Finally ran 2 plates in the pack which was way better. Eventually it slipped on acceleration turned out it was the pressure plate all along. Replaced that & have run Surflex fibre plates dry for 13 years. That's the 960, I'm sure yours will put even more torque out.
 
Fast Eddie said:
Anyone used the RGM bronze high torque clutch plates in a dry set up?

Do they grip any better than other types when used dry?

I’m trying to cure some high rpm slippage on a ‘healthy’ 1007 motor and am looking for good options.
Click to expand...

RGM Hi Torque clutch plate conversion (2018)

Hello Gents, I bought one of these (BRONZE CLUTCH CONVERSION, WITH 5 HI-TORQUE BRONZE PLATES ) a while ago from rgm to replace the original bronze plate´s that were in my bike (1974 mk2) When i went to install them i came across the fact that these friction plates, are a lot thicker than the...
www.accessnorton.com www.accessnorton.com


Nigel,
Read post 17 from Jimmy Comstock, you might find it interesting
Pete
 
I've had them in my bike for around 6 years now running dry.
I'm not shy of giving it a handful and have had no problems with slippage or any other problems.
 
Chris said:
I used bronze plates one season & they never slipped. However they came in with a bang. Finally ran 2 plates in the pack which was way better. Eventually it slipped on acceleration turned out it was the pressure plate all along. Replaced that & have run Surflex fibre plates dry for 13 years. That's the 960, I'm sure yours will put even more torque out.
Click to expand...
What pressure plate did you end up using? And, do you have a steel against it or a fiber plate?
 
Chris said:
I used bronze plates one season & they never slipped. However they came in with a bang. Finally ran 2 plates in the pack which was way better. Eventually it slipped on acceleration turned out it was the pressure plate all along. Replaced that & have run Surflex fibre plates dry for 13 years. That's the 960, I'm sure yours will put even more torque out.
Click to expand...
What was wrong with the pressure plate ?
 
Thanks for the input chaps.

Mine has the thick Surflex plates in and consequently only has 4 friction plates (it’s what was supplied with the belt kit etc) but does have narrowed down plain plates dobba. I have a 5 plate Barnett pack to try (which I use successfully in the 920) and a 5 plate RGM High Torque pack on the way. I’ve a couple of different pressure plates I can play with. So one or t’other should sort it.

Interestingly we could see the clutch slip on the dyno, couldn’t feel or hear it, so it was micro slippage. But then after a day on the track I could def feel the slippage.
 
Steel or alloy pressure plate youz guys?

The RGM clutch I have uses an alloy pressure plate. It gets chewed up and starts chewing up the friction against it if I slip the clutch some leaving stops. Roger has a note about using an unspecified pressure plate made of alloy with a steel against it to increase life of the alloy pressure plate. I'm curious to know if anyone has done what Roger is talking about. A steel pressure plate would probably fix it, but add some weight to the clutch.
 
Schwany said:
Steel or alloy pressure plate youz guys?

The RGM clutch I have uses an alloy pressure plate. It gets chewed up and starts chewing up the friction against it if I slip the clutch some leaving stops. Roger has a note about using an unspecified pressure plate made of alloy with a steel against it to increase life of the alloy pressure plate. I'm curious to know if anyone has done what Roger is talking about. A steel pressure plate would probably fix it, but add some weight to the clutch.
Click to expand...
Yes I don’t think using alloy to rub against friction plates is wise IMHO. If using an alloy pressure plate I’d have it pushing against a plain plate. If I want the pressure plate to push against a friction plate, I use steel.
 
Hi Schwany I've always run alloy pressure plates RGM did 2 thicknesses. I run fibre against it. My one went through the hardening & wiped itself against the bronze plates. Galling?
Eddie I also had the diaphragm spring allowing slipping of clutch on drive. I had loads of clutch bits by then as I had had a disaster at Darley Moor. Lots of people offering advice steel plates cleaned, lots of clutch height changes. Bronze plates worked. Went all the way to Scotland & it all started again. Swapped out the whole clutch. Too much changed, I thought it was working because of the new fibre plates, however eventually found it was the diaphragm that was allowing the slippage.​
 
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