It appears you're interested in specifications for the E-Ton Viper ST Exl-150. This ATV model is powered by a Single cylinder, four-stroke engine with 149.50 ccm (9.12 cubic inches) of actual displacement before 9.7:1 compression. Fueling is metered via Carburettor allowing this machine to produce its horsepower and torque. According to our records engine heat of the E-Ton Viper ST Exl-150 is moderated by Air. You'll need to get familiar with the Automatic transmission and pay attention to final drive Belt maintainence. Our best information shows that the front tire size is 21/7-10 and the rear is 20/11-9 . 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 Double disc front brakes and Expanding brake (drum brake) rear brakes. The E-Ton Viper ST Exl-150 was launched in 2010, 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.