Trying to Time my 1975 xl 250, I have spark and the bike runs, has a brand new battery. When I kick it with the plug out it has spark, (my test light is good) but when I rotate the motor by hand and try to check the points at the wire with my test light I get no light. Grounded the light to every posible good spot o the bke, Six volt system too week to light the light?? I just want to time the thing.... and adjust the carb.... wich leads to another question... Does any one know the recipe for the air filter mod that doesnt effect jetting?? Thinkin about just using the stock set up and wrapping it with uni foam / hot glue / and zip tying it to the original cage inside the original box.