Fuel: When it does run or dies it smells super rich. I have pulled the carbs, cleaned, bench sync'd them, and adjusted the air/fuel mixture screws with no noticeable changes. Jets are clean/clear, floats and needles are set to stock settings and moving as the should.
Air: There's no change trying to run it with/without the air filter, and the engine revs higher when carb cleaner is sprayed into the airbox so I believe it's getting air
Electrical: Spark plugs are new, coils are good, all the connections seem to be clean/tight/functional, and I've tested it with two different batteries without any difference between the two. The resistance values of all the electrical bits are within spec. The signal generator is giving a low peak voltage (from two separate parts) which is the only measurement out of spec I can see so far, so I swapped it out with another one which unfortunately didn't change much.
My thought process: It's got fuel and air, so the spark must be the issue, but the only signal generator peak voltage is out of spec. (low) and it's didn't change when swapping in another part so the problem is upstream. The signal generator runs off then end of the crank, if the crank isn't turning over fast/hard enough it's not providing enough rotation to produce a strong signal. Why? Low compression? Weak spark?
Any suggestions? Or am I barking up the wrong tree?
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