It appears you're interested in specifications for the Chang-Jiang BD 50QT-5. 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-5 is moderated by Air. You'll need to get familiar with the transmission and pay attention to final drive Belt maintainence. Our best information shows that the front tire size is 3.5-10 and the rear is 3.5-10 . 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 Single disc. Hand operation, disc front brakes and Expanding brake (drum brake). Hand operation, drum rear brakes. The Chang-Jiang BD 50QT-5 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.