Motorcycle exhaust muffler

Abstract

The exhaust muffler includes a flat box-shaped body that underlies substantially the width of the motorcycle engine and frame. The rear end of the muffler body has exhaust vents that vent the exhaust downward or laterally from the motorcycle forward of the rear wheel. An inlet neck extending from the front end of the muffle body allows convenient and direct connection of the exhaust pipes from the motor to the muffler body without numerous or complicated bends in the exhaust pipers. The low profile of the muffle body allows the exhaust muffler to be mounted beneath the motorcycle frame without significantly effecting ground clearance.

1 . In combination, a motorcycle and an exhaust system, the motorcycle including a frame, a motor mounted atop the frame and a rear wheel mounted to the frame aft of the motor, the exhaust system including an exhaust muffler and a exhaust pipe connected between the motor and the exhaust muffler, the exhaust muffler mounted beneath frame forward of the rear wheel and underlying substantially the width of the motor beneath the frame and includes a flat box-shaped body having an interior therein and a front end and rear end, the muffler body also has an exhaust opening therein for venting exhaust beneath of the frame and forward of the rear wheel. 
   
   
       2 . The combination of  claim 1  wherein exhaust muffler includes plurality of baffles spaced within the muffler interior between the muffler body front end and the muffler body rear end. 
   
   
       3 . The combination of  claim 1  where the exhaust muffler also includes an inlet port extending upward from the muffler body front end and connected to the manifold. 
   
   
       4 . The combination of  claim 1  wherein the exhaust opening vents is located along the muffler body rear end exhaust downward from the muffler body. 
   
   
       5 . The combination of  claim 1  wherein the exhaust opening is located adjacent the muffler body rear end and vents exhaust from the motor laterally from the muffler body. 
   
   
       6 . An exhaust muffler for a motorcycle having a frame, a motor mounted to the frame and a rear wheel mounted to the frame, the exhaust muffler comprising:
 a flat box-shaped body mountable to a motorcycle beneath motorcycle frame forward of the rear wheel and underlying substantially the width of the motor beneath the frame, the muffler body defining an interior therein and having a front end and rear end, the muffler body also having an exhaust opening formed therein for venting exhaust beneath of the frame and forward of the rear wheel; and   an inlet neck extending upward from the muffler front end and connectable to the motor.   
   
   
       7 . The exhaust muffler of  claim 6  wherein exhaust muffler includes plurality of baffles spaced within the muffler interior between the muffler body front end and the muffler body rear end. 
   
   
       8 . The exhaust muffler of  claim 6  where the exhaust muffler also includes an inlet port extending upward from the muffler body front end and connected to the manifold. 
   
   
       9 . The exhaust muffler of  claim 6  wherein the exhaust opening vents is located along the muffler body rear end exhaust downward from the muffler body. 
   
   
       10 . The exhaust muffler of  claim 6  wherein the exhaust opening is located adjacent the muffler body rear end and vents exhaust from the motor laterally from the muffler body.