On a more practical level, the M90 is a bit shorter in wheelbase than the M109 (66.5 in. to 67.3 in.), which along with a narrower 200mm rear tire (still biggest in class), makes it a bit more nimble than its big brother. The instruments are more abbreviated than the 109 as well, dropping the tach, but stuffing the speedo (with clock, digital fuel gauge, and trip meters) into the headlight shroud, with indicator lamps on the uppermost edge of the tank, so everything is visible with a full-face helmet on (for those, like us, that swing that way). While the M109R has radially-mounted front brake calipers, the M90 does not. However, it does still have dual twin-piston calipers pinching full-floating disks up front and a single twin-piston floating setup out back as well. The fuel tank is the same wide, arched shape as the M109R's, but like all else about the bike, scaled down slightly from 5.2 to 4.8 gallons.