I did some numbers to better understand how a 675 Triumph Triple, with a big, old stroke 9.8mm longer than the Project 1 Yamaha R6’s 42.5mm, could make competitive power. If both engines rev to equal levels of piston acceleration, 16,000 rpm by the Yamaha would translate to 14,400 for the Triumph. If they breathed and burned equally well at those revs, they’d both make close to 140 peak horsepower. Looks like Saner’s done some interesting work. Might be a story there.