Diagnosed many things but still no spark

[afr00t]

Hey guys, I'm a new member and this is my first post on do the ton. I bought a Yamaha XS360 few months ago from a friend who had it sitting for a year or more and the bike doesn't have a spark at all. I ran some diagnostic that i might cause the spark plugs not to spark and i still didn't figure out the problem yet. things i did are:
-Replaced the coils
-Replaced spark plugs
-Replaced spark plug caps
-Adjusted the contact point gaps
-All fuses are fine and tested
-Battery is brand new
-Kill switch is tested and work properly

Everything seems to be fine except there's no spark, i thought it could be the ignition condenser but i checked the contact points for a volt with a voltmeter and it was reading around 90 volts. Main things that i'm confused about now is that on the first key switch the spark plug caps read 90 but on the second key switch it doesnt read anything, but on the first key switch with contact points its doesnt read anything but on the second switch it reads 90 shouldn't the first switch read 90 for both contact points and spark plug caps? help is appreciated.

 

[gsdapollo]

First things first. Are you getting power to the rest of the bike with the ignition on? Is the bike turning over?

If so, my next question is: Your reading 90volts? Im no electrician but 90v's on a bike with a 12v battery doesnt seem right. You sure you're reading volts or have the right setting on your multimeter?

Secondly, volts are only part of the equation. I believe ohms (resistance) are what you actually need to be testing on the ignition circuit. On my bike, 84 650 honda, the manual doesnt tell you to test for volts on the ignition circuit. It only tests for ohms. I just ran into the same problem last week. I had one plug wire showing infinite resistance and one ignition point showing infinite resistance. Replaced both and immediately got spark. Check your manual and see what it says.

Anyways, thats my 2 cents. Let us know!!

 

[afr00t]

Thank you gsdapollo for your help but i ended up finding the problem and it a short in the circuit. Whoever had the bike before me assembled the contact points wrong and missplaced one of the assembly's washers. I put the washer in the right place and it fired up right away.