The short dual shock 129" track keeps the snowmobile nimble and easy to maneuver through a long day spent on the trails. Top Features Dual Shock SR 129 Rear Suspension: The drop-link style Dual Shock SR 129 rear suspension is the cumulative result of years of punishment and development in snocross and cross-country competition. Utilizing a 'free-acting' front arm which effectively couples to the rear arm under torque loads while letting the front arm float to follow the bumps, keeping the skis firmly planted. This is accomplished using a U-shaped slot on the leading arm that fits over a fixed mounting shaft to allow a limited amount of free sliding movement. This features offers the best of both uncoupled small bump compliance with optimum coupled weight transfer control. Genesis 1049cc High Performance Engine: The 3-cylinder Genesis engine has been regarded as the industry’s best four-stroke engine. Featuring a sophisticated closed-loop fuel injection system and 4-valves per cylinder, the 1049 engine delivers a class-leading horsepower, instant throttle response and a thick torque curve that jettisons you from corner to corner in a blink of an eye. All with great fuel economy and a reputation for bulletproof durability. HPG Shock Package: The SRViper R-TX receives a full compliment of proven, aluminum High Pressure Gas shocks with beefy .5 inch shafts front and rear to handle all the challenges the trail can dish out YVXC Clutching: Featuring Yamaha drive and driven clutching, the YVXC system delivers smooth engagement, instant acceleration, fast reacting backshift, and cool operating temperatures for a long belt life. The YVXC clutch system delivers Yamaha’s hallmark smooth power delivery, responsive engine feel and unmatched quality.