Hello new to the forum, have a 73 st90 was running had weak spark but ran good once running. Now cant get spark, the coil/plug wire is very old and rigid. I gapeed the points , and cleaned them. Can someone tell me the resistances for the coil and where to take them from?? I have the coil out. also how to test the stator??? I have a multi-bike clymer manual that has very little on the st90.... Please help me get my mighty green 90 up and running again thanks for all help! Aaron.