We install the Akrapovič Titanium Race exhaust with an OPF delete on the GR Yaris—unlocking raw sound and performance! Hear the difference in our full install and driving test. Is this the ultimate ...
Abstract: A Yamaha YZ400, 5-valve, 4-stroke cycle, motocross racing, motorcycle engine is instrumented to provide pressure diagrams in the exhaust system which are recorded over the usable engine ...
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