That seems odd. For all intents and purposes, surges and spikes won't bother the coils. It's the ignition module I'd be worried about. (Especially if I splashed 5 or 600 bucks for it). I'm surprised he's concerned about the coils...
As for the DC to DC converter, there are far simpler ways to squelch DC transients. At the most basic level, a good old fashioned zener diode can even do the trick.
Last edited by desertrefugee
on Fri Aug 09, 2019 8:18 pm, edited 1 time in total.
'97 Valkyrie, '86 VMax Project, '79 CBX-Z, '78 GL1000, '83 Voyager Lite Project, '78 750F BIG Project, '74 750K HUGE Project
"Motorcycling is not, of itself, inherently dangerous. It is, however, extremely unforgiving of inattention, ignorance, incompetence or stupidity." - Anonymous