Ignition or Carb problem

Just a dab of dielectric grease on the tips of the wires before screwing on the plug cap.

I replaced all of the spark plug wires. If I do a mag check anywhere above 3000 rpm, I only get 125 rpm drop on either ignition. Below 3000 rpm, it has a miss. Tomorrow I will be removing the carbs and checking them out. I hope I find something that fixes the problem.

Don't do a mag check at 3K. It should be up around 4K. There is a reason we don't do mag checks that low. If your good to go with a 4K mag check then leave it alone.

Hi Roger,

Mag check at 4000 ist mandatory prior take off. We will agree. If  I shout down the engine i switch off one mag first, switch on this mag and switch off the other, only for looking what happend and if both mags are sound. This at idle. Then finally i switch off both. Is this wrong? Can something damage at this?

Greetings

Installed new plug wires, cleaned both carbs and installed new floats. Synced carbs at 4000 rpm, 3000 rpm and 2000 rpm all good there. 12- rpm drop on both mags at 4000 rpm. It still idles like crap and the exhaust pipe leaving the muffler is full of black soot.  I am about to remove the muffler and see if it is one cylinder that is running rich making the exhaust black. After that I think I’ll. Give up on this engine.