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MJC476

Maintenance intervals

3 posts in this topic

I know this has been asked a heap of different ways before, but.... I would like to know how long (in hours) you should run between replacing/rebuilding the following parts without doing un-necessary work or pushing the use by date too far.

Piston Rings

Piston (& rings)

cam chain (& bottom sprocket?)

split cases & check/repair bottom end & gearbox

There is enough info on valve monitoring adjusting out there, but any other component you may think is important to replace regularly.

Thanks:thumbsup:

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It's tough to guess at the hours, but I'll guess that I put on about 75-100 per year. But only about a third is racing. The rest is hard recreational riding.

In that environment, a new cam chain annually is about right. You do not want to replace the bottom sprocket; it's cut directly on the crank. You can figure out what that means, right?

As to the rest, I have to say, I don't know. My '03 has had nothing more than oil changes and two cam chains since it was new. Original rings, original piston, never a valve adjustment. I'll say that it might be a good idea to re-ring it soon.

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Thanks Gray,

A cam chain every 100 hours & might as well wack a set of rings out of the spares kit in at the same time. That won't be too taxing on the wallet or time.

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