I'm no expert, but, I think the older Triumphs, and the new
Bonnies, are a true 360, and the pistons fire at the same
time. Bump, bump, bump, bump. Maybe the 270 degree timing
is an attempt to make it sound more like the V-twins,
ba-dump, ba-dump, ba-dump. What the heck do I know anyway?
I have the BUB's, and like the way my bike sounds.
Charlie
