Help! Still no consistent spark

[phatman1969]

Ok, here I go again. 82 xs400 DOHC. Have wired everything back in except that rear brake switch everyone helped me with(thanks for that.) I still get no spark on the left side. Coils are in spec, pick up coil in spec, getting power to coils, bypassed clutch switch, and still only one small spark on the left plug when I release the starter button. Right side fires just fine. I know there is power on the left coil. New plugs as well. I know I must be overlooking something simple. Any advice would be appreciated, even if it sounds crazy because I am pulling me hair out.

 

[bentwrench]

How is the boot and plug wire? DanMach and I have both had trouble with a boot.

They just screw on and grab the copper strands in the wire.