Claims
- 1. An exhaust system for a Harley-Davidson® motorcycle with a V-Twin engine, wherein the exhaust system increases the engine's performance and incorporates original equipment manufacturer (OEM) attachment locations to a motorcycle chassis, said system comprising:
a first exhaust port in communication with a first cylinder of the engine to discharge a first pulse of exhaust gas; a second exhaust port in communication with a second cylinder of the engine to discharge a second pulse of exhaust gas, wherein the first and second exhaust ports are both located on a first side of the V-Twin engine; a first exhaust pipe having an inlet end and an outlet end, wherein the inlet end is connected to the first exhaust port for scavenging and routing the first pulse of exhaust gas along the first side and in a direction aft of the motorcycle chassis; a second exhaust pipe having an inlet end and an outlet end, wherein the inlet end is connected to the second exhaust port for scavenge and routing the second pulse of exhaust gas through the motorcycle chassis and along a second side of the V-Twin engine in a direction aft of the motorcycle chassis, wherein the first and second sides are substantially parallel with the motorcycle chassis, and wherein the second exhaust pipe utilizes an OEM attachment point to the motorcycle chassis; a first muffler connected to and in flow communication with the first exhaust pipe, wherein the first pulse of exhaust gas is expelled through the first muffler to the atmosphere; and a second muffler connected to and in flow communication with the second exhaust pipe, wherein the second pulse of exhaust gas is expelled through the second muffler to the atmosphere.
- 2. An exhaust system according to claim 1, wherein the second exhaust pipe comprises an upstream pipe and a downstream pipe, wherein the upstream pipe is in communication with the second exhaust port and routes the second pulse of exhaust gas from the first side of the motorcycle chassis and towards the second side, and wherein the downstream pipe is in flow communication with the upstream pipe and further routes the second pulse of exhaust gas along the second side of the motorcycle chassis.
- 3. An exhaust system according to claim 1, wherein the upstream pipe comprises a first elbow in flow communication with the second exhaust port.
- 4. An exhaust system according to claim 3, wherein the upstream pipe comprises a second elbow in flow communication with the first elbow.
- 5. An exhaust system according to claim 4, wherein the second elbow comprises a first sub-elbow and a second sub-elbow, wherein the second sub-elbow is in flow communication with the first sub-elbow.
- 6. An exhaust system according to claim 5, wherein the upstream pipe comprises a third elbow in flow communication with the second elbow, wherein the third elbow routes the second pulse of exhaust gas from the second elbow and towards the second side of the motorcycle chassis.
- 7. An exhaust system according to claim 6, wherein the length of the first exhaust pipe and the length of the second exhaust pipe are approximately equal.
- 8. An exhaust system according to claim 6, wherein the length of the first exhaust pipe is within 10% of the length of the second exhaust pipe.
- 9. An exhaust system according to claim 8, wherein the first and second exhaust pipe have 1¾ inch diameters.
- 10. A motorcycle with a two cylinder V-Twin engine and a true dual exhaust system, wherein the true dual exhaust system individually routes exhaust gases from the two cylinders to a pair of mufflers.
- 11. A motorcycle according to claim 10, wherein the true dual exhaust system comprises a first and a second exhaust pipe, both of which are of approximately equal length.
- 12. A motorcycle according to claim 10, wherein the length of the second exhaust pipe is within 10% of the length of the first exhaust pipe.
- 13. A motorcycle according to claim 10, wherein the second exhaust pipe comprises an upstream pipe.
- 14. A motorcycle according to claim 10, wherein the first and second exhaust pipes comprise 16-gauge steel.
- 15. A motorcycle according to claim 14, wherein the first and second exhaust pipes have 1¾ inch diameters.
- 16. A motorcycle according to claim 14, wherein the first and second exhaust pipes have 1 and ⅞ inch diameters.
- 17. A motorcycle comprising:
a frame; a V-twin engine attached to the frame and having a first and a second cylinder head, each containing a cylinder, wherein the first and second cylinder heads exhaust gas on a same side of the V-twin engine; and a dual exhaust system in flow communication with the two cylinder heads and configured to route exhaust gases from the two cylinders, to different sides of the frame, and to the atmosphere.
- 18. A motorcycle according to claim 17, wherein the dual exhaust system further comprises:
a first exhaust pipe having an inlet end and an outlet end, wherein the inlet end is connected to the first cylinder for scavenging and routing exhaust gas away from the cylinder and to a first muffler; and a second exhaust pipe having an inlet end and an outlet end, wherein the inlet end is connected to the second cylinder for scavenge and routing exhaust gas through the frame and to a second muffler, wherein the first and second exhaust pipes are separate from one another.
- 19. A motorcycle according to claim 18, wherein the first and second exhaust pipes are of approximate equal length.
- 20. A motorcycle according to claim 18, wherein the length of the first exhaust pipe is within 10% of the length of the second exhaust pipe.
- 21. A motorcycle according to claim 20, wherein the second exhaust pipe comprises an upstream pipe.
- 22. An exhaust system component for a Harley-Davidson® motorcycle with a V-Twin engine, wherein the V-twin engine comprises first and second exhaust ports, both located on a first side of the V-twin engine, wherein the second exhaust port is located rearward of the first exhaust port, said exhaust system component comprising:
an exhaust pipe having an inlet end and an outlet end, wherein the inlet end is configured to route exhaust gases from the second exhaust port and through the motorcycle and along a second side of the V-Twin engine in a direction rearward of the motorcycle, wherein the first and second sides are substantially parallel with the motorcycle, and wherein the exhaust pipe utilizes an OEM attachment point to the motorcycle.
- 23. An exhaust system component according to claim 22, wherein the exhaust pipe comprises an upstream pipe and a downstream pipe, wherein the upstream pipe is in communication with the second exhaust port and routes the exhaust gases from the first side of the motorcycle and towards the second side, and wherein the downstream pipe is in flow communication with the upstream pipe and further routes the exhaust gases along the second side of the motorcycle.
- 24. A method of processing exhaust gases from a V-Twin engine in a motorcycle, wherein a first pulse of exhaust gas is produced in a first cylinder of the V-Twin engine and a second pulse of exhaust gas is produced in a second cylinder of the V-Twin engine, the method comprising:
routing the first pulse of exhaust gas from the first cylinder and along a first side of the V-Twin engine, wherein the first cylinder exhausts the first pulse of gas on the first side of the V-Twin engine; and routing the second pulse of exhaust gas from the second cylinder and along the first side of the V-Twin engine and back under a seat of the motorcycle to a second side of the V-Twin engine, wherein the second cylinder exhausts the second pulse of gas on the first side of the V-Twin engine, and wherein the first pulse of exhaust gas and the second pulse of exhaust gas follow different flow paths.
- 25. A method of making a motorcycle exhaust system for a motorcycle with a V-Twin engine with a first exhaust port in communication with a first cylinder and a second exhaust port in communication with a second cylinder, wherein the first and second exhaust ports are both located on a first side of the V-Twin engine, the method comprising:
attaching a first exhaust pipe having an inlet end and an outlet end to the first exhaust port for routing a first pulse of exhaust gas along the first side and in a direction aft of the V-twin engine; attaching a second exhaust pipe having an inlet end and an outlet end to the second exhaust port for routing the second pulse of exhaust gas through the motorcycle and along a second side of the V-Twin engine in a direction aft of the motorcycle, wherein the first and second exhaust pipes are not in flow communication with one another.
- 26. A method of making a motorcycle exhaust system according to claim 25, further comprising:
attaching a first muffler to the first exhaust pipe, wherein the first pulse of exhaust gas is expelled through the first muffler to an atmosphere; and attaching a second muffler to the second exhaust pipe, wherein the second pulse of exhaust gas is expelled through the second muffler to the atmosphere.
- 27. A method of making a motorcycle exhaust system according to claim 25, wherein the first and second sides are substantially parallel with the motorcycle, and wherein the second exhaust pipe utilizes an OEM attachment point to the motorcycle.
RELATED APPLICATIONS
[0001] This application claims priority from U.S. Provisional Patent Application Serial No. 60/326,026, entitled TRUE DUAL MOTORCYCLE EXHAUST SYSTEM, filed Sep. 26, 2001 the disclosure of which is incorporated herein by reference in its entirety.
Provisional Applications (1)
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Number |
Date |
Country |
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60326026 |
Sep 2001 |
US |