Effect of failing/failed condensor?

[Bob Culver]

Low voltage checks of condensers do not prove much. Usually either produce a spark or not. Retarded or lack of spark advance will limit revs but usually evident as a flat sound and surging accel at higher speeds.  Does the rotor feel normal when twisted? Is throttle opening fully?
Valve bounce revs exceed 40 mph in 3rd so unlikley unless a broken spring. 
On another make I had a silencer baffle come loose. Severeley reduced performance but esp speed.