These are the known mechanical and performance specifications for your 2011 Yamaha YFM90.
Displacement88.00 ccm (5.37 cubic inches)
DetailsSingle cylinder, four-stroke
Bore/Stroke47.0 x 51.0 mm (1.9 x 2.0 inches)
Fuel Economy & Polution
Fuel Capacity4.80 litres (1.27 gallons)
Front SuspensionIndependent double wishbone, 78 mm stroke
Rear SuspensionSwingarm, 83 mm stroke
Seat Height654 mm (25.7 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height910 mm (35.8 inches)
Total Length1,490 mm (58.7 inches)
Total Width885 mm (34.8 inches)
Ground Clearance100 mm (3.9 inches)
Wheelbase1,010 mm (39.8 inches)
Wet Weight120.0 kg (264.6 pounds)
Wheels & Brakes
Front BrakesExpanding brake (drum brake)
Front Brake Diameter
Rear BrakesSingle disc
Rear Brake Diameter
It appears you're interested in specifications for the Yamaha YFM90. This ATV model is powered by a Single cylinder, four-stroke engine with 88.00 ccm (5.37 cubic inches) of actual displacement before 10.2:1 compression. Fueling is metered via Carburettor allowing this machine to produce its horsepower and torque. According to our records engine heat of the Yamaha YFM90 is moderated by Air. You'll need to get familiar with the Automatic transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 18/7-8 and the rear is 18/9-8 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Expanding brake (drum brake) front brakes and Single disc rear brakes. The Yamaha YFM90 was launched in 2011, and we're happy to know (or assume) you've got one in your garage. To help you keep your ride in tip-top shape, consider purchasing an owner or service manual.