A snowmobile tunnel stop protection system to provide protection to a tunnel from a studded endless track used on a snowmobile. The tunnel includes at least one slot formed into an undersurface of the tunnel. At least one protection rail extends from a first end to a second end and includes a plurality of holes passing through the protection rail. A plurality of fasteners are used to attach the protection rail to the tunnel where each fastener has a first fastener portion that passes through the at least one slot. Each fastener includes the first fastener portion that passes through one of the plurality of holes and a second fastener portion that couples to the corresponding first fastener portion to couple the protection rail to the slot formed in the tunnel.

In a saddle riding vehicle including: a swing arm that supports a rear wheel; a sprocket disposed at the rear wheel; and a chain that meshes with the sprocket to thereby drive the rear wheel, the rear wheel includes a rear wheel-side protruding portion that protrudes from the sprocket to an outside in a vehicle width direction, a chain cover fastening portion, to which a chain cover for covering the chain is fastened, is disposed on the outside in the vehicle width direction with respect to the rear wheel-side protruding portion and protrudes to an inside in the vehicle width direction, and the chain cover fastening portion is disposed at a position at which the chain cover fastening portion overlaps the rear wheel-side protruding portion in a vehicle side view.

In a saddle riding vehicle including: a swing arm that supports a rear wheel; a sprocket disposed at the rear wheel; and a chain that meshes with the sprocket to thereby drive the rear wheel, the rear wheel includes a rear wheel-side protruding portion that protrudes from the sprocket to an outside in a vehicle width direction, a chain cover fastening portion, to which a chain cover for covering the chain is fastened, is disposed on the outside in the vehicle width direction with respect to the rear wheel-side protruding portion and protrudes to an inside in the vehicle width direction, and the chain cover fastening portion is disposed at a position at which the chain cover fastening portion overlaps the rear wheel-side protruding portion in a vehicle side view.

A cover member configured to cover a drive-power transmission member is fixed to a swing arm with a simple structure. A saddle-ride type vehicle includes a swing arm swingable up and down, a rear wheel supported at a rear end portion of the swing arm, an endless drive-power transmission member extending along the swing arm in a front-rear direction and configured to transmit drive power of a power unit to the rear wheel, a cover member fixed to the swing arm and covering the drive-power transmission member, and a slider provided on an upper face of the swing arm and configured to receive the drive-power transmission member. The cover member includes a fastening portion that is fastened to the swing arm by a fastener and an engagement portion that engages with the slider.

A cover member configured to cover a drive-power transmission member is fixed to a swing arm with a simple structure. A saddle-ride type vehicle includes a swing arm swingable up and down, a rear wheel supported at a rear end portion of the swing arm, an endless drive-power transmission member extending along the swing arm in a front-rear direction and configured to transmit drive power of a power unit to the rear wheel, a cover member fixed to the swing arm and covering the drive-power transmission member, and a slider provided on an upper face of the swing arm and configured to receive the drive-power transmission member. The cover member includes a fastening portion that is fastened to the swing arm by a fastener and an engagement portion that engages with the slider.

An all-terrain vehicle includes a chassis, an engine, and a ground engagement member. The vehicle features a drivetrain that operatively connects the engine to the ground engagement member to deliver propulsive power. The drivetrain comprises a first shaft with a first bearing housed in a fixed bearing retainer and a second shaft with a second bearing housed in a rotatable eccentric bearing retainer. The center of the second bearing is offset from the center of the eccentric bearing retainer, allowing for the adjustment of the distance between the first and second shafts by rotating the eccentric bearing retainer. This configuration enables precise control over the drivetrain alignment, enhancing the vehicle's adaptability to various terrain.