Velo Solex Engine Double Clutch Unit Spring

To fit the double clutch unit on the following VeloSolex:- 

– SoleX 1700 
– SoleX 2200 
– SoleX 3300 
– SoleX 3800 
– SoleX 4600 
– SoleX 5000 
– SoleX PliSoleX 
– SoleX Micron 
– TrotileX 
– Westhoek 
– Mopex S4800 Black’n Roll