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From: schwager@uiucdcs.CS.UIUC.EDU
Newsgroups: net.cycle
Subject: Re: Vision Rumblings
Message-ID: <8800041@uiucdcs>
Date: Mon, 14-Jul-86 16:30:00 EDT
Article-I.D.: uiucdcs.8800041
Posted: Mon Jul 14 16:30:00 1986
Date-Received: Wed, 16-Jul-86 04:17:51 EDT
References: <3830@reed.UUCP>
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Nf-ID: #R:reed.UUCP:3830:uiucdcs:8800041:000:1243
Nf-From: uiucdcs.CS.UIUC.EDU!schwager    Jul 14 15:30:00 1986


> /* ---------- "Vision Rumblings" ---------- */
> engine is warm (ie is operating in its normal temp range) I am hearing
> a "rattling" noise as the bike is accelarated to 4,000 RPM range and
> above.  No noise when it is cold, or when the weather is colder (or at
> least not as much noise).
> 
> My question is:  Are these noises normal (just the bike getting old)
> or should I start to worry?  Performance has not been affected.
> 
> Thanks in advance,
> 
> Jan Kubic CFI-AIME
> /* End of text from uiucdcs:net.cycle */

I noticed a rattling noise on acceleration in my KZ750 just a couple of
weeks ago.  It was doing it when warm and under hard acceleration.  The
solution?  I had been running your basic no-lead gas; I tried premium
no-lead.  Bingo! No more rattle.  The problem was simply engine knock.
Try a higher octane gas and see what happens.  By the way, performance
wasn't affected on my bike either- but the long term effects of knocking
can be serious.

-mike schwager
-- {ihnp4,convex,pur-ee}!uiucdcs!schwager   schwager%uiuc@csnet-relay.arpa
	University of Illinois, Dept. of Computer Science

P.S.  A general rule I follow is that any noise that wasn't there and all
of the sudden is, becomes "not normal", by definition.