Sometimes they won't run on 1 cylinder due to a valve issue / bent pushrod. Has spark itself been verified or is it just known that one side is not running?

I am not familiar with the Kawa V twin but B&S and Kohler V twins both use a weird Kill wire harness wirh diodes in it. Before buying a $300 item, I would disconnect the Kill wire from the coil/module and see if runs on both cylinders then.

Walt Conner

Tomplum,I tested wires that go to the coil.Light lit up & I changed coil but still wouldn't fire on left..Asked repair folks & they said it sounds like bad ignition module,around $300.If I can get somebody to haul it in they will test it out.If I find out I need ignition module I can order it online for $100.
Wayne

Hi,had it happen to me, was a bent valve and main stud had worked loose. also rocker had come off.......fixed cheap.,runs like a top now.It was a Kohler V twin 15 hp.

You could really pull the valve cover of the non running cylinder and see what you can see. Or a 100$ for a known good part isn't too bad. It may pay off, or not. Then you would have a spare....