Clutch plates for 1971 750 Commando

I will be buying new friction plates and perhaps new steel plates. I note on the RGM website they list two thicknesses, 3.2 and 3.6 mm for friction plates and three thicknesses, 2, 3 and 4 mm, for steel plates
Lawrence at RGM told me that the different thicknesses are to allow altering stack height for tailoring the clutch pull.
Has anyone here experimented with using different thicknesses? Any recommendations or caveats?

I also see that they offer two types of friction plates, the Surflex and the "postage stamp" Ferodo's. Any opinions on the two types.

Thanks,
Ed

APRRSV said:

I will be buying new friction plates and perhaps new steel plates. I note on the RGM website they list two thicknesses, 3.2 and 3.6 mm for friction plates and three thicknesses, 2, 3 and 4 mm, for steel plates
Lawrence at RGM told me that the different thicknesses are to allow altering stack height for tailoring the clutch pull.
Has anyone here experimented with using different thicknesses? Any recommendations or caveats?

Click to expand...

The 3.2mm friction plates are basically intended for the later (late 750 and all 850) 5 friction plate and 'thin' pressure plate clutch and 3.6mm are for the early 4 friction plate and 'thick' pressure plate clutch.


http://atlanticgreen.com/clutchpak.htm
http://atlanticgreen.com/ndnsclutch.htm
https://www.oldbritts.com/ob_clutch_info.html

Don't overdo the stack height especially when fitting new friction plates or you could end up with clutch slip if you go too far.

APRRSV said:

Has anyone here experimented with using different thicknesses? Any recommendations or caveats?

Click to expand...

I haven't "experimented" as such, but I did increase the stack height to provide a two-finger clutch during my conversion to belt primary drive.

Worntorn noted that he achieved a one-finger clutch on his 850 without slippage (belt drive).

You didn't state what type of primary drive you have. If it's chain, a light clutch setup is likely to cause slippage with oily plates.

Go with the Barnett clutch pack. No having to free the plates off every time, and a significant loss of weight in your drive train. I've had mine in for 40,000 miles with no issues at all.

Thanks to all for the replies. And thanks to Dynodave for the info on his website.

Ed