schwager@uiucdcs.CS.UIUC.EDU (07/14/86)
> /* ---------- "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.