You can use any later Lucas
stator / rotor ... and a capacitor
to run a cub ... without a battery .
I run a pazon with a single phase Lucas
stator and cap . I think there is one exception .
There are a few RM20 (high output) stators , from the late 60's , that may be to wide to fit ? Lucas
used 70mm rotors in the 50's , at some point (1963?) The standard rotor was changed to 74mm O.D. with 19mm I.D.
When they changed the rotor standard they left the the stators outside dimentions and mounting hole locations 'as before' ... so the parts are backwards compatible (with few exceptions)
Early cubs came with a 70 mm rotor and matching stator .
The only change , on a cub , needed
to use any of the later Lucas
stators with 74mm rotors
Is an adapter sleeve and distance piece
As cubs crank is undersized at 15.5mm and later 74mm rotors have a 19mm hole .
parts needed (fitted from 1963 ? onward) to fit a 74mm rotor .
E4458 Spacing washer
E4455 Woodruff key E4454 Adaptor sleeve
E4058 Tab washer
E3971 Retaining nut