Motorcycle

A motorcycle comprising:

• a vehicle body frame;
• an engine main unit disposed on the vehicle body frame;
• a rear wheel;
• a swing aim having a rear end portion journaling the rear wheel and a front end portion vertically and swingably supported on the vehicle body frame;
• a rear shock absorber disposed between the vehicle body frame and the swing arm;
• a rider's seat;
• a muffler disposed downwardly of the rider's seat and positioned, in a side view, upwardly of the rear wheel when the rear shock absorber is extended;
• and
• a side cover;
• wherein the muffler includes an outer shell having a rhombus cross section with two pairs of side walls, each pair including side walls extending in parallel with each other, the two pairs having long and short diagonal lines;
• the muffler is disposed on at least one side in a vehicle width direction of the rear wheel wherein by inclining the long diagonal line of the two diagonal lines outwardly in the vehicle width direction at lower levels, one pair of the side walls out of the two pairs of side walls extends in a vertical direction;
• and
• the side cover formed to extend along the upper and outer side walls out of the four side walls of the outer shell of the muffler is disposed to cover the muffler from a side, downwardly of the rider's seat;
• wherein the muffler has a rear end portion disposed forwardly in a side view of an axle of the rear wheel at least when the rear shock absorber is extended.