Date: Mon, 25 Nov 2002 20:24:42 +0100 From: "Johan Beikes" <j.beikesnopsamdoo.nl> Subject: Re: c900 harmonic droning?
"Lance Morgan" <alancemornopsamo.com> wrote in message news:2a52f3e9.0211241647.193dd2ffnopsaming.google.com... > I recently purchased a 91 900S (briefly had a 86 900T years ago), and > am really enjoying it. > > I've noticed something I'd appreciate comments on: a harmonic type > droning - always starting at 70 mph up to at least 85 mph, and have > also sometimes heard it ~ 45 mph in 3rd, albeit a slightly different > tone. More than one gear, would point to a slight imbalance in the engine and/or clutch assembly. Have you observed rpms? > > The noise is moderate in pitch and, at high speed, has a repetitive > frequency of less than 1 second. It reminds me of riding in a twin > engine airplane > > The noise completely abates when I push the clutch in, coasting at > high speed. Supports my theory, IMHO. Johan > > Probable cause? > > > Thank you, > > Lance > 5 spd 3dr 125K
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