Rear cylinder not firing
 

Hey, everyone bike was running great yesterday and today the rear cylinder stopped firing. I checked and the spark is good. Compression seems good, but the pipe is cold.Maybe timing? It's got a point system that will soon be replaced by an electronic ignition...initially stumped...

Swap the plug wires and see if it follows

Smart.
It did not follow.

Got a compression gauge?

No but I'll get one tomorrow

I quickly checked the pushrods to see if they were super tight and maybe causing a valve to not fully close. They seem adjusted properly - they should be hydraulic lifters, right?
Also, it will occasionally backfire through the rear pipe if I try to add some throttle but that's the only sign of life from the rear cylinder at the moment :(

Intake leak or a bad condenser.

Swapped spark plugs and wires?

I'm gonna yank the carb and intake and reinstall with new stuff.

I have a new ignition enroute...

I did swap the wires and plugs and misfire stayed in the rear.

Firing the parts cannon I see. Need to bear down, diagnose and find the problem. Far cheaper in the long run.