The F750 monocoque spaceframe and P86 have KONI damper assemblies . Konis some say are archaic nowadays .
Ceriani cartridges?
- Thread starter davamb
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pommie john said:
I remember from a pic that Daveamb posted in another thread, his damping internals are very basic, and would need some better control of rebound damping. As far as I understand from Race Tech, cartridge emulators control compression damping, and rebound damping is adjusted by changing the oil viscosity: http://www.racetech.com/page/title/Emul ... hey%20Work
If there are shops in Aus that fit them, they should be able to do what is necessary to improve rebound damping as well as fitting the emulators. That would probably be the simplest and most cost-effective solution.
daveh said:
I think the Marzocchi and Ceriani are similar internally. My Marzocchis have just one hole that does the rebound damping and a ball bearing check valve to separate the rebound from the compression damping. You can adjust the rebound damping with the oil viscosity or by drilling out the rebound hole bigger, or by filling it in and re drilling it smaller.
I'd talk to Suspension Improvements in Slacks Creek Qld .
Basic! That's being rather too kind. As far as I can determine there's no damping at all for the first couple of cm, it just floats on the spring. This may or may not be intentional, but it's not a recipe for a stable setup. I have bought some proper fork oil, both 10 and 20 weight, and experimented with different amounts and mixes and ended up just putting straight 20 in.daveh said:
I've no idea Bill, there's no model information on the forks anywhere that I can determine. Might have been once, but perhaps ground or polished off long before the bike came to me.bsaboss said:
I've had a response from Chirs Cosentino who requested more information. I'll have to pull a fork leg apart and take some measurements. A weekend task.
And back by popular demand - shots of the bits in the fork:
pommie john said:
Good suggestion from pommiejohn. Why not send this guy some photos and dimensions, ask him if he would be willing to take on the job and what would be involved. There is not much you can do with the damper piston. The later Cerianis had deeper pistons with piston rings, and rebound check valves. He should be able to make or modify the necessary parts or he might have internals from other models that he could adapt. After that, fitting the emulators is simple. You can then tune your compression damping via the little preload nut on the emulator and play around with different grades of fork oil. It would be a big improvement on what you have at the moment.
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