|   Problematic old Marzocchi | GrahamKracker
May 19, 2003 9:52 AM | | OK, so this problem is a little complicated. First of all, I'm working on some sort of z1, I believe it is a '99 or '00, because it has a bolt on crown, but does not have the older, round knurled metal preload adjustment knobs that I believe date back to '98. Also, there are RCR Bomber Cartridge stickers on the backs of the fork legs, leading me to believe that some aftermarket cartridges might have been installed at some point. I think the fork was originally red, because there is red paint inside the bottoms of the sliders, but now the rest of the fork is polished.
And for the problem. All things considered, the compression stroke really doesn't feel that bad. The problem is there is a load THUNK when the fork tops out. I have not taken the fork apart yet, I'm waiting until I have the time and some idea of what to look for. I also need to get some oil because I figure it would use a change by now. Any thoughts? |
| prolly a '99.... more | logbiter
May 20, 2003 5:42 AM | | most marzocchi models went to the 'm' arch and *i think* pressed on crown's in 2000. I've had '97,'98 &'99 Z2/z3's and am still running a '98 & '99 z2. As I recall the RCR cartridges were a sweet upgrade.
As for the clunk, I'm guessing perhaps too much preload and maybe not enough oil in there. I had problems with a top-out thunk, which was too much preload w/o enough oil there (came from factory that way- a notorious 'zoke problem).
Golden spectro 7.5 wt is the marzocchi stock oil. I also like Silkolene fork oil and have my local motorcycle shop order it for me, as it's much cheaper than buying 'marzocchi' fork oil at the bike shop.
Any motorcycle fork oil w/o seal swellers will work just fine in the marzocchi (eg maxima, pj1, bel ray, etc... which a local moto shop would likely keep in stock).
hope this helps,
Serge |
| re: Problematic old Marzocchi | PK
May 20, 2003 9:21 PM | | Before you dump the oil from the fork legs, get an idea on the oil level. With the RCR damper you have compression on the bottom and rebound on top. I wouldn't be surprised if you found the oil levels ok, but rather found the rebound valve shim shattered. If the shim has failed be certain to take extra care to flush any steel from the damper and also the fork legs. Save the parts so you can get the dimensions for a replacement, I think I used shims from Fox rear dampers as a direct replacement.
Personally I've had RCR dampers and also been involved with Darrin from RCR and Chuck bicycles. Entering Thumper mode...if you can't say something nice...
PK |
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