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Old Jul 21, 2003, 04:00 AM
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Tuned pipe on a four stroke 120


I've seen tuned pipes advertised for use with 4-stroke engines and I
wondered how much use they are ? I know on a 2-stroke they improve
breathing and power considerably but I'd always assumed that with the
separate intake and exhaust cycles on a 4-stroke there was no advantage
to using a tuned pipe ? If I am wrong here does anyone know what sort
of power increase an OS 120 FS might expect from the addition of a
just-engines style tuned pipe ?




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