It appears you're interested in specifications for the OSSA 500 Yankee. This Allround model is powered by a Twin, two-stroke engine with 488.00 ccm (29.78 cubic inches) of actual displacement before 8.1:1 compression. Fueling is metered via allowing this machine to produce its 58.00 HP (42.3 kW) horsepower and torque. According to our records engine heat of the OSSA 500 Yankee is moderated by Air. You'll need to get familiar with the 6-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 3.25-19 and the rear is 4.00-18 . 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 Single disc front brakes and Single disc rear brakes. The OSSA 500 Yankee was launched in 1978, 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.