RE: 100cc plug distance, Getting it closer
Don't know how long the plugs will last but I have been running a 3W 150 for over two years with same plugs
the reason I did the swap over test was to see if it would work and save any space for 35% Extra cowls so I could offer it when new engines are ordered from me, The only up charge would be the extra cost for the CM6 plugs
If anyone wants to try it on there engine I think Ralph Conninham has the ignitions and the adapters, He has good prices on the ignitions
Milton