Hi NoVa,
I made the change to the 90 degree NGK...had no problem, rode 100 miles today.
Like you I was curious about the stock wire.....what kind of core is it? Kept looking for metal strands but could find none.
Do you know if the wire detaches from the coil or is molded on?
Might have preferred the 45 degree cap, but this seems to be working OK.
jb