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Has anybody done an autopsy on a failed unit and definitively determined that the CDI failures have been as a result of heat?
Not to my knowledge, but like I said heat is the enemy of electronics.
In the early days of electronic ignition in autos the control module was placed in the engine compartment with no shielding or insulation. Failure was very common; in fact when I was a Ford mechanic I would advise anyone who cared to listen to carry a spare module in their car so they could replace it if it failed in an inconvienient loctaion (don't they always ?  )
Therefore, seeing the location of these igniters with no shielding of any kind leads me to believe that heat could be a factor in the seeming large number of igniter failures for these bikes.
So, while there is no proof that modular warming is a factor, there is compelling evidence for the theory.
Contra todo mal, mezcal; contra todo bien, también
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