2015 Arctic Cat TRV 550 Limited EPS, Features550 H1 4-Stroke Engine w/EFI: Pulling, accelerating and climbing. That’s what our engines are good at. And this one is no exception. The potent 550 H1 engine is a 545cc, SOHC, liquid-cooled single cylinder sporting electronic fuel injection.Ride-In Suspension: Our Ride-In suspension has proven it can handle whatever the trail puts in front of it. Impressive 11 inches of ground clearance and 10 inches of suspension travel. Double A-arms optimize wheel motion translating into more responsive steering and better cornering.