XS11 Off Idle Stumble

[cajun31]

Bonz, the bike is running great. It was a weak Dyna coil.

Any ideas on what caused the coil to weaken?

[DEEBS11]

Cajun31, I measured the primaries and secondaries of each coil with a meter. The old failed coil and the new, out of the box coil and the numbers are identical. The issue with the coil is nothing you can measure when it is out of circuit. However, put a load on it and the bad coil is weak enough to cause erratic motor stumble at lower RPMs. Must be an internal short between windings (probably secondary). The coil works but is not correct due to decreased windings caused by an internal short. Perhaps by just a few windings.