A snowmobile has a frame having a tunnel; at least one ski operatively connected to the frame; a motor supported by the frame; an endless drive track disposed at least in part below the tunnel and operatively connected to the motor for propulsion of the snowmobile; a suspension assembly operatively connected to the frame, the suspension assembly supporting and tensioning the endless drive track, the suspension assembly having a least one rear idler wheel, the at least one idler wheel defining an idler wheel rotation axis; and a snow guard connected to the suspension assembly. The snow guard has a deflector. The deflector has a leading edge and a trailing edge. The leading edge is rearward and upward of the idler wheel rotation axis. The trailing edge is rearward and upward of the idler wheel rotation axis.

A tunnel and battery box assembly for a snow vehicle includes a tunnel covering at least a portion of an endless track. The tunnel also includes a first heat exchanger coupled to the first sidewall; a second heat exchanger coupled to the second sidewall, a fuel tank, a first thermal cover coupled to the first heat exchanger between the first heat exchanger and the fuel tank, a first insulating layer disposed on an upper surface of the first thermal cover, a second thermal cover coupled to the second heat exchanger between the second heat exchanger and the fuel tank, and a second insulating layer disposed on an upper surface of the second thermal cover. The vehicle may also include a battery box structure having a battery receiver receiving the battery, and a fuel tank mount integrally formed in the battery box structure coupling the battery box to fuel tank.

A tunnel and battery box assembly for a snow vehicle includes a tunnel covering at least a portion of an endless track. The tunnel also includes a first heat exchanger coupled to the first sidewall; a second heat exchanger coupled to the second sidewall, a fuel tank, a first thermal cover coupled to the first heat exchanger between the first heat exchanger and the fuel tank, a first insulating layer disposed on an upper surface of the first thermal cover, a second thermal cover coupled to the second heat exchanger between the second heat exchanger and the fuel tank, and a second insulating layer disposed on an upper surface of the second thermal cover. The vehicle may also include a battery box structure having a battery receiver receiving the battery, and a fuel tank mount integrally formed in the battery box structure coupling the battery box to fuel tank.

A track for traction of a vehicle (e.g., a snowmobile, an all-terrain vehicle (ATV) etc.). The track being movable around a track-engaging assembly comprising a drive wheel to drive the track. In one embodiment, the track comprising: a carcass comprising a ground-engaging outer surface for engaging the ground and an inner surface opposite to the ground-engaging outer surface; and a plurality of traction projections projecting from the ground-engaging outer surface; wherein: a thickness of the carcass from the ground-engaging outer surface to the inner surface is no more than 0.20 inches; and a ratio of a widthwise rigidity of the carcass over a longitudinal rigidity of the carcass is at least 1.5.

A track for traction of a vehicle (e.g., a snowmobile, an all-terrain vehicle (ATV) etc.). The track being movable around a track-engaging assembly comprising a drive wheel to drive the track. In one embodiment, the track comprising: a carcass comprising a ground-engaging outer surface for engaging the ground and an inner surface opposite to the ground-engaging outer surface; and a plurality of traction projections projecting from the ground-engaging outer surface; wherein: a thickness of the carcass from the ground-engaging outer surface to the inner surface is no more than 0.20 inches; and a ratio of a widthwise rigidity of the carcass over a longitudinal rigidity of the carcass is at least 1.5.

A snow vehicle includes a vehicle frame and a rear suspension. The rear suspension includes a rear suspension frame, a drive belt coupled to the rear suspension frame, a propulsion driven member coupled to the belt and drivingly coupled to the propulsion drive member, a linear element coupling the propulsion drive member and the propulsion driven member, and a guide positioned below a lower run of the linear element and moving the lower run of the linear element closer to the upper run of the linear element at the guide.

A snow vehicle includes a vehicle frame and a rear suspension. The rear suspension includes a rear suspension frame, a drive belt coupled to the rear suspension frame, a propulsion driven member coupled to the belt and drivingly coupled to the propulsion drive member, a linear element coupling the propulsion drive member and the propulsion driven member, and a guide positioned below a lower run of the linear element and moving the lower run of the linear element closer to the upper run of the linear element at the guide.

An endless track for use in propelling a snowmobile. The endless track extends between a first lateral side and a second lateral side and includes an inner drive surface and an outer ground-engaging surface. The inner drive surface includes a plurality of longitudinally spaced inner drive lugs used to drive and rotate the endless track. The outer ground-engaging surface includes a plurality of treads, where each tread extends continuous and uninterrupted along a constant height from the first lateral side to the second lateral side a full width of the endless track.

A snowmobile has a suspension with a spring. The spring has a central loop portion and an elastomeric bushing disposed in the central loop portion. A limiting cable is disposed adjacent to the spring. The snowmobile also has a rear snowmobile suspension with a torsion link structure. A control arm is pivotally connected to a first end of the torsion link structure. A wheel assembly is pivotally connected to a second end of the torsion link structure. A first slide rail is attached to the wheel assembly with a sliding mechanism. A track around the rear snowmobile suspension has a paddle oriented substantially perpendicular to the track. A first gripping element is disposed on the face of the paddle.

A snowmobile has a suspension with a spring. The spring has a central loop portion and an elastomeric bushing disposed in the central loop portion. A limiting cable is disposed adjacent to the spring. The snowmobile also has a rear snowmobile suspension with a torsion link structure. A control arm is pivotally connected to a first end of the torsion link structure. A wheel assembly is pivotally connected to a second end of the torsion link structure. A first slide rail is attached to the wheel assembly with a sliding mechanism. A track around the rear snowmobile suspension has a paddle oriented substantially perpendicular to the track. A first gripping element is disposed on the face of the paddle.