I have read several similar problems on here. I have an 87 with intermitent spark. I have figured out by dumb luck, if you leave the key on for about 20 minutes, most of the time it will start. I have checked the cdi, coil, pusle generator, etc. and all wiring connections i come across. I was hoping someone might email me a wiring diagram at Heimlick896@aol.com, or someone might have the solution to my dilema. Thank you.