Quote:
Originally Posted by Xringer
Why two spark plugs? I've heard of a redundant spark plug on an ultra-lite airplane,
but motorbikes don't crash if a spark plug fails..
|
Pretty sure it's just to reduce emissions by ensuring more complete combustion. There's no power gain to be had.
The SV650 went to 2 plugs per cyl in 2007, and I'm pretty sure it didn't bump HP but may have increase MPG slightly.