Forks

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mcnicol said:
Crispin

Didn't you have to drill some extra holes in the tops of the damper valves too? I was given a hand-drawn diagram (which seems to have disappeared) of how to install my emulators, which did indicate I had to drill a bunch of holes, and I was waiting until I'd found some extra damper valves so if messed up I wouldn't destroy my ride.

Ken
Click to expand...

Hi Ken, I didn't drill any holes in the top of the damper valves (not sure where you are referring to). The Gold valves handle compression and not rebound, effectively the complex set of valves in the Ceriani is for rebound. Compression is pretty rudimentary (in both Marzo and Ceriani) and the gold valve takes over this job, so to allow it to work you have to reduce the normal restriction imposed by the hole at the bottom of the damper rod by creating additional holes so the Emulator can take over responsibility for controlling the compression stroke oil flow. To adjust rebound you need to play around with oil viscosity, we recently changed from 5W to 10W to dampen the rebound which was a bit aggressive causing a bit of instability.

JLO's site gives a more graphical example.

http://www.laverdamania.net/suspensiongb.htm

Cheers Crispin
 
You are supose to enlarge the origanal holes to disable the origanal damping part of the fork that the Emulator does the job off replacing.Thats what I did on the KX 125 Mx non Cartridge forks I fitted to my 1982 Husky Automatic.I got Terry Hays to do the Emulators in the Cerarnis on my 3C.
 
Ken,

If your talking Marzocchis you have to drill out the holes on the bottom of the dampener rod, lose the ball bearing valve on the top and drill this opening out to increase the compression flow. Also, some people weld up the two side holes on the top bulkhead but others reckon you don't need to because it's related to rebound dampening which is controlled by oil viscosity anyway. I run Motul 20 wt in mine, emulators set on one turn, and it's works perfectly. The only issue I have is stiction which probably can only be cured by inserting teflon bushes in the top and bottom of the fork leg. RaceTek list a part number and Terry Hays is aware of it but hasn't done one yet (as far as I'm aware). The problem is doing the bottom internal bush and I haven't heard of anyone doing it yet. RobJota was talking about this a few months ago.

As soon as I can work out how to do it I will. It'll transform the forks into something we're not used to. Terry Hays told me a story about how they bushed the forks of a blokes 60's racing Triumph. He took it out to he track and came back complaining about how the bike was bouncing all over the place. Hays reckoned this was the first time these forks had actually moved up and down freely so it exposed how little dampning was available. Needless to say that was the easy bit to fix.


Rob (Moto) My bomb came with Ceriani trees and Marzo legs. It worked ok but I chose to convert it all to Marzo. Crispin bought my Ceriani triple clamps.

Cheers
Chris
 
Come to think of it. I've got all the drawings here but I haven't a clue how to get pictures unloaded so they can appear in posts. I can do the tiny ones but not the big ones you guys are doing.

Chris
 
Chris ,
          Follow the link in this http://www.laverdaforum.com/forum/index.php?topic=39857.0

Worked for me . I am totally illiterate when it comes to computers but one read of this and I can post pictures.

Regards,
Ally
 
Chris

Open a Photobucket or Pkaso account, and upload your images to the hosting service. When you get the image uploaded, view your image hosted remotely (like, at Photobucket) and right click on it, select "Properties" from the menu that pops up, then highlight and Ctrl-C copy the url that shows up in the properties box to your clipboard. If you do the same thing on Crispin's picture on this page you can see his remote-hosted image is http://pic60.picturetrail.com/VOL1702/11403829/23496908/392135984.jpg (sorry if I'm giving away trade secrets, Crispin :D)
Next, start a posting on the forum, type in .... well, whatever you want to say, then (just like posting an attached image), click the "Additional Options" plus sign at the bottom, but instead of browsing to your image on your hard drive, just Ctrl-V paste in the url that's stored on your clipboard (or type it in if yourself that's the way you've done it, but everybody makes mistakes when you do that).
Then go ahead and post as usual. If you don't want everybody to laugh at you don't create a new forum to post in, because (at least in Laverdapedia) you can't delete your own forums, only your own postings, if you mess up. Guess how I know :-[. Probably the same here, haven't tried yet.
Say hi to the family for us anyway, really enjoyed my stay in the coldest place in Queensland, have to do it again someday. I may be back next winter too, will have the ball and chain with me this time, though, finances permitting.

Ken
 
Ken,

Sounds like a good idea if you ever want to live here again i.e bringing the ball and chain.

Got to sell the place as best as you can when you can. An accidental Laverda tour (visiting owners) on the East Coast might be a good idea to beef up your case. Winter in the New England sounds very romantic to some sheilas (carving up corners on the Oxley or Thunderbolts, staying in pubs, drinking too much, eating shit food, crapping on with your mates, breaking down occasionally, sitting around in the morning sun smoking durries and drinking tea wondering where to go next and when - I miss her already)


Chris
 
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