front end bouncing?

[gasgas1999]

Hi everyone this is my first post, I have a gasgas 250ec on a 1999 the bike is great but the suspension is poor. The front end seems to bounce about and rear end feels very soft?
I have replaced the fork oil with 7.5w with 140mm air gap with the springs out ant the fork compressed. I set the rear sag to 100mm,I thought the suspension would have been great on this bike with marzocchi forks and ohlins rear shock?
Does any body have a owners manual for this bike so i get set it back to standard settings?
Thanks Jay

 

[pscook]

Bouncing front end is usually too little rebound damping. I found that my 2002 would "deflect" without enough rebound damping, so I turned the until it stopped bouncing, then two more clicks, then adjusted from there. I don't know where our rebound adjustment is, but turn it clockwise about six (6) clicks and see how it works. Then start turning it counter (anti)-clockwise until the bouncing starts again. That is where you start adjusting for feel.

As to the rear, probably the same condition, too little damping on the rebound and compression. it's a matter of fiddling and taking notes. Find a decent test loop, and keep riding and adjusting until it feels right. Then you're done.

Good luck, suspension can be as (or sometimes more) frustrating than jetting.

 

[Jakobi]

I agree with above. Every time mine has bounced its because the bike is rebounding too fast which then pushes the whole end of the bike back up off the ground.

 

[gasgas1999]

thanks for the replys, im going out trail riding in the morning so i will start adjusting the clickers and see what happens

 

[Rick]

If those are the eom 45 Zokes conventional forks? One leg is the compression and the other leg is rebound. The adjusting knobs will tell you which is which.......
@
So the settings should not be the same on both legs..

 

[smallpuffydog]

I agree that you most likely need more rebound control...though one other possibility is that you have too much rebound and the fork is "packing up" or not getting the chance to fully recover so as you hit a series of bumps or rocks.

It should be pretty easy to tell if you have too much dampening by pushing down on the fork while it is sitting still.

One other thing is that you should try to get the front and rear ends to feel as similar or as balanced as possible (i.e. if the back is soft, the front should be soft).

Oh, and MOST IMPORTANTLY take apart the entire rear linkage / swing arm, check and grease all pivot points.

 

[gasgas1999]

Hi i adjusted the rebound clickers 2 clicks at a time and got it dailed in pretty nice

But I bought some lowering links and fitted them before i went out today because im a bit of a short ars*.

As soon as i sat on the bike I knew it was not right, anyway I took the bike out for a nice trail ride with my buddys. I found the front end was better once I played with the rebound clicker, but the rear end was too low down and the bike was way out of balance.

The lowering links are going on fleabay