A snowmobile assembly including a snowmobile chassis having a motor compartment at a front portion and an endless belt channel at a rear portion. A motor is located substantially in the motor compartment substantially in front of the endless belt channel. The motor includes at least one fuel control mechanism arranged toward a front portion of the snowmobile chassis. By arranging the at least one fuel control mechanism toward the front portion of the snowmobile chassis, the snowmobile assembly provides for greater mass centralization and/or a lower center of gravity than it would otherwise have if the at least one fuel control mechanism arranged toward the rear t portion of the snowmobile chassis. The greater mass centralization and/or a lower center of gravity can also be achieved by arranging the at least one exhaust port toward the rear of the snowmobile chassis. A drive train couples the motor to an endless belt drive shaft located in the endless belt channel. An endless belt is located in the endless belt channel coupled to the endless belt drive shaft.