Causes of Weak Spark @ Points? Ig Switch?
I'm getting a 1970 TR6 that sat for a while back to running order, and have been troubled by a weak spark at one of the points.
In my restoration efforts, I've used the manual and a multimeter to check the low voltage circuit from the battery through the ig. switch, and to the coils, and was able to carry 12+ volts the entire way.
Interestingly, I was able to get continuity across _any_ two the ignition switch blades without the key in the ignition. A short?
I did however replace the condensers and plugs and regap and clean the points for insurance. I've not yet checked the dwell or timing.
For a while, the bike only ran on one cylinder (left),then after I replaced the condensers and regapped the points it ran on both, but it constantly backfired at idle the first time it ran on both. (That may have been an air-fuel issue...or not.)
Yet the right set of points only sparks periodically and weakly, and the bike won't start at present. I know a weak battery will contribute to this, but the spark has been weak even w/a 12.46 charged battery. I'd like to build a checklist of _specific_ ways to eliminate components and identify the problem.