Riders Of Vision

So I pushed an electrical cable down the rear cylinder inlet to the crossover, & got it to exit on both the left & right hand sides.

Had the same problem with tach dropping to zero and running on one cylinder. New spark plug caps cured it. Also I've cut open  an exhaust. Rear head pipe runs into left muffler.

I have seen a cutaway view of the chamber where the front and rear cyl exhaust go into and there is not a separation between front and rear cyl. They both dump into the chamber and exit out both mufflers. I think it was in the service manual that I saw that.

I think someone will have to cut open a set of mufflers to verify this, but from my borescope investigation, it appears that the the exhaust from the front and rear cylinders do not merge at the crossover.

Checking the exhaust out of the mufflers won't really tell you anything as the 2 cylinders merge in the collector. You will have to take a squirt bottle and spray water on the pipes out of the cylinder head. Sizzle is good. You should see a difference.

FYI, I had the same symptoms (no tach, one cylinder) and installed the Ignitech unit and it has worked perfectly for over a year.

It has not happened again, but if it does, or I guess when it does, I will check the exhaust to see if there is a difference between the two sides.  I recently replaced the mufflers with a stock set that is cosmetically better and did some scoping.  The mufflers are more complex than I figured:  The exhaust from the two cylinders is not combined in the crossover.  The front cylinder exits through the right pipe, the rear cylinder exits through the left pipe.

Since there isn't anything interesting to discuss during the break, they are suggesting concessions for Honda and Yamaha who have never benefited from concessions. Of course Ducati who benefited from 5 years of concessions oppose the idea.

Yes, I have a multimeter.

I will have to research clutch switch.  Already checked sidestand.

Pretty sure I already cut the revlimiter wire also.  Years ago.

Thanks for your  assistance and input.

Possible issues: plug wires/caps, wire connections on offending coil,  . . . . . ummmm . . .it's gotta be something.  Can you tell which cylinder is misfiring?