It appears you're interested in specifications for the Chang-Jiang BD 50QT-4. This Scooter model is powered by a Single cylinder, four-stroke engine with 139.00 ccm (8.48 cubic inches) of actual displacement before 10.5:1 compression. Fueling is metered via allowing this machine to produce its 3.35 HP (2.4 kW) horsepower and torque. According to our records engine heat of the Chang-Jiang BD 50QT-4 is moderated by Air. You'll need to get familiar with the transmission and pay attention to final drive maintainence. Our best information shows that the front tire size is 3.00-10 and the rear is 3.00-10 . 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 front brakes and rear brakes. The Chang-Jiang BD 50QT-4 was launched in 2007, 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.