Exhaust gas control device for motorcycles

Power plants – Internal combustion engine with treatment or handling of... – Pulsed – timed – tuned or resonating exhaust

Patent

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Details

60324, F02B 2702

Patent

active

049999990

ABSTRACT:
A number of embodiments of exhaust control devices particularly adapted for use with motorcycles and wherein the exhaust control device is designed to be positioned beneath the engine transmission assembly of the motorcycle and which offer a compact configuration. In each embodiment, the expansion device is formed of a fabricated member from sheet metal stampings. The exhaust device comprises an inlet or collector section an expansion chamber and an outlet. In some embodiments, both the inlet collector section conduits are formed from joined stampings and the expansion chamber is formed from joined stampings and in other embodiments only the expansion chamber is formed from joined stampings and the inlet conduits of the collector section are formed from formed tubular members. In all embodiments, an exhaust control valve is positioned in the expansion chamber for controlling the pulses existent in the inlet conduits of the collector section and the exhaust pipes so as to improve performance through out the entire engine load and speed ranges.

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