Scooterotica

Doing a service on a mates engine and replacing the clutch plates. I have 2 sets on the shelf, 1 is Surflex B and 1 us Surflex D. Both are for Lambretta. Is there a difference? This is for standard SIL209 engine with clubman and 26mm Delly so 'low' power/torque... rebuilding with uprated clutch springs as the standard ones are already slipping...

I have a similar set up to that, don't know the difference between Surflex B or D, but I use surflex B plates with M B springs and it works a treat.