single ex engineer, like tinkering with bikes, but this jawa is a total nightmare. won,t start easily, new clutches fitted, wont kick start, bangs and locks up. the starter shoes system is very unreliable and the slightest thing will stop it working, ie spring tension, thickness of contact pads, driving shoes and pads spring tension ect the same problem, also will not tick over, rear wheel spinning, adjusted carb, no effect. just bought strong black clutch springs . approx 2.500 rpm. but can,t now start bike to test this modification. ordered new tyristor unit. new plugs, it is a real pig. should have been fitted with re coil starter or kick starter, or electric, any help please???