I have a 92 4 cycle gas EZGO Medalist that's having firing problems and wont start. Battery has full power, generator works great. I cleaned the pulsar and wheel which pulsar generates spark, but not getting spark all the time or at least enough for the engine to start. I adjusted the valves, it had 120 and 140 compression now it has 155 and 160 compression. I put new NGK spark plugs in. The only thing I'm not certain of is spark plug wires, they are pretty stiff and hard. Any help will be appreciatted thanks guys.