Tuesday, May 6, 2014

Marzocchi 43mm fork design and impact of oil level on spring rate, Part 3: More fork details

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Just a short update.  I had an S2R800 in today for service and had the forks apart.  While they looked identical to the Marzocchi ones, I noticed that the markings in the inside of the lowers were different.  On closer comparison, it's the brand part that is different, everything else is identical.  I have no idea who makes them, but it is a symbol I see on a lot of these late model forks.  Photos below show them, Marzocchi with 'M' cast logo on left.



I did notice that the RH leg, which is the one I had played with previously, had rebound damping and no compression.  But the LH leg had compression damping and no rebound.  A little for most of the travel, a lot more in the last 30mm or so.  So as a combination they provide both, and that way you can tailor them as desired individually with different oil weights for example.

I added 15mm more preload, using pieces cut from an original spacer.  I'm not sure 15mm is enough now that I think about it, given it had nearly 55mm of sag before we started.  But we'll see.  I also dropped the oil level to 135mm.
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