Stiff Clutch, is there an lighter one

In my 20 BHP TS1 I have a standard 5 plate surflex clutch, which is a bit stiff, but exaggerated by stiff finger joints that will only get worse with time. I've changed all the clutch and gear cables to the BGM friction free, which have only made a slight difference. So is there a lighter clutch assembly out there.
Gear change is also stiff, compared to my other lambrettas, but i think that may be down to the uprated spring in the layshaft or possibly a worn sliding dog, but I'll check these over the coming miserable dark winter months.
Out of interest, I have a 21BHP Monza with a standard 4 plate surflex clutch and standard spring in the layshaft and standard cables. Clutch operation and gear change is as light as a feather and I have had no long term issues with the clutch. I suppose I may have answered my own question, but would like to see what others have in the way of light feel clutch.
Gear box in both of the above is GP200 (SIL) with 42/19 sprockets
Thanks
Gear change is also stiff, compared to my other lambrettas, but i think that may be down to the uprated spring in the layshaft or possibly a worn sliding dog, but I'll check these over the coming miserable dark winter months.
Out of interest, I have a 21BHP Monza with a standard 4 plate surflex clutch and standard spring in the layshaft and standard cables. Clutch operation and gear change is as light as a feather and I have had no long term issues with the clutch. I suppose I may have answered my own question, but would like to see what others have in the way of light feel clutch.
Gear box in both of the above is GP200 (SIL) with 42/19 sprockets
Thanks