Posted May 23, 201014 yr I have an 82 XS400 with electronic ignition. The last time I had my bike running it was fine. It sat for about 12 days in the garage, battery unhooked most of it. I installed a new battery today (freshly charged) and it would not start, turned over and over and then one huge backfire. I pulled the left plug and had no spark. Here are the symptoms -I shorted the battery by accident to the frame while I was installing it. -Sometime I get a spark in the right cylinder, sometimes not. -When the right cylinder is working, if I swap the signal wires to the coils I will get spark in the left cylinder, none in the right. -After the starter runs and stops, there is a pause and then a spark on the right cylinder (discharge?) -I checked all the plugs leading to the coils, the pickup coil, etc. -I am using a booster pack for a battery power.
May 23, 201014 yr Author Update : now I have nothing, no spark at all. I have checked all the connection to all the plugs and cleaned them, I opened the ignitor box to see if I can see any damage, nothing at all, no solders cracked, no hot spots, etc. I checked the off/run/on switch and it seems to be working. Cleand and checked the conections inside the headlamp. I guess I need to know how to test the ignitor, the rectifier, etc. I don't have access to any parts bikes so this could be difficult.
May 23, 201014 yr Author Update again I found the problem, one of the terminals int the plug to the ignitor was busted in two. Replaced an away I go. Took me 7 hours and tearing half my bike apart to find it. I checked that plug about 6 times before I noticed it...
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