Dan, why do they call them 270 degree cranks instead of calling them 90 degree cranks, Thanks. My sons Yamaha has a cross plane crank with the throws all four at 90 degree intervals. Interesting. I guess mfrs. like to use the biggest numbers they can for everything.
Flyer, then there is the 540 cubic inch V-8 1155 which interestingly idled on four cylinders.