Date: Wed, 25 Apr 2001 07:56:25 -0700 From: John Davies <jedaviesNOSPAMnopsamier1.net> Subject: Re: Timing chain replacement
On Wed, 25 Apr 2001 14:22:09 +0100, "Grunff" <runffnopsamo.com> wrote: >Agree with Bob (except the bit about serpentine belt; 900s don't have them, >only 9ks). Very rare to need to replace chain on a 900 before 200k miles. Is >it rattling much? If so, then most likely is the tensioner, then the guides. >Chain is very easy to check for stretch, but if you don't know how to, then >get dealer to do it. Only if the chain is stretched does it need replacing. Just to clarify: a chain doesn't "stretch". It actually lengthens because the pins and bushings wear, and the cumulative slack in those parts causes the chain to lengthen. The problem is that the pitch (distance between links) increases also. This is what wears out the sprockets. If you have ever looked at a neglected bicycle that has a worn out chain, you will notice that the rear cogs are "hooked" - the teeth have worn because the longer pitch of the junky chain no longer fits properly. Sorry....I couldn't help myself. John Davies Monroe WA USA
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