to standard ignition distributor means not shown which is connected to distributor drive 78 in fig3 distributor drive 78 in turn is connected to distributor gear 80 which drives the ignition distributor and oil pump 82 which provides oil to oil pressure regions 53 and lubrication to other moving parts of the engine distributor gear 80 in turn is driven by drive shaft pinion gear 84 which is rigidly attached to drive shaft 86 a flywheel not shown is attached to drive shaft 86 rotative power is transferred to drove shaft 86 by way of the dual action geneva cam 88 in fig3 and 6 which is connected by offset drive means 90 in fig2 7 and 8 to inner cylinder shaft 42 and outer cylinder shaft 34 outer cylinder shaft gear 92 is rigidly connected to outer cylinder shaft 34 and meshes with long geneva shaft pinion gear 94 as depicted in fig2 and 8 long geneva shaft pinion gear 94 in turn is connected rigidly to long geneva shaft 96 which is rigidly connected to a first driving member 98 of dual action geneval cam 88 as depicted in fig6 long geneva shaft 96 and pinion gear 94 are rotatably supported by bearings 100 in fig6 and 102 in fig2 longitudinal motion of long geneva shaft 96 is prevented by sleeve 104 similarly inner cylinder shaft gear 106 is rigidly attached to inner cylinder shaft 42 and meshes with short.