[jbranson]

I was taking the bike apart looking for the reason it was handling like shit last week and found the right side shock had lost it's rebound dampening.
Any of you suspension gurus know if/how this would affect handling? I found a line hard to hold when I hit bumps, the back end was moving around a lot.

I just rebuilt both rear shocks using the guts from a pair of NOS Mullhollands I had lying around. Had to use the original shock bodies and damper tube because the NOS set was about an inch shorter. The Mullhollands seem to use the same damper rod, and compression valve, just have a longer damper tube and shock body. Same travel on both.
JohnnyB

 

[jbranson]

Come on...one of you freakin Rossi blowing wanna be fast guys has got to have some input on this.

JohnnyB

 

[Craig]

You lost 50% of your dampening and ask if it's going to have an effect?

Yes. It will.

Craig

 

[jbranson]

Well...it was only rebound dampening.....says me.

Of course I noticed shocks seem to have about three times the rebound dampening when compared to compression dampening....so maybe it's important...says me.

And then you say....

JohnnyB

 

[texmawby]

yep, says me.

tex

p.s.- the one's on my cb are made by monroe, no kidding!


Edited by - texmawby on May 26 2005 3:51:51 PM

 

[FR]

Try mounting 'em upside down...

Just kidding, I had a visual that looked funnier in my brain.

So did you notice this after you had rebuilt the shocks?

I actually have nothing to contribute. Shocks are like a black art to me. I put 'em on and ride. Haven't touched 'em since. If they lose too much compression damping I'd notice, but otherwise I probably wouldn't notice any other problems until I put on a fresh pair (of shocks that is) and then do some laps.

I think I'm more observant of suspension when I'm watching somebody trying to cope with their bike on the track. Then I can see what the effects of poor set-up are in a specific corner or section. When I'm riding I'm just not sure if it's me or the bike unless it's a pretty bad component failure. That's one good justification for having someone videotape your race...at least that's what I'm sayin'...

FR

 

[Craig]

If you don't have rebound dampening, which is effectively what you have when one of the shocks looses it's ability to dampen, the rear of the bike will begin to pogo. If that's a verb. Each time you hit a bump the shock will absorb the bump in a controlled manor but because there is no rebound dampening the shock will extend quickly being only controlled by the spring. And the back end will tend to bounce in an uncontrolled manor. If you add leaning and turning to the mix it certainly would make the bike harder to control.

I'm not sure how you would have lost rebound dampening but not compression dampening. Unless maybe you have a set of those ultra trick Ohlins shocks on the back of your bike.

 

[jbranson]

Craig,
It was only noticable in turn three and nine. Hit a bump...back end scoots over a few inches.
I have Mulholland shocks...seperate compression and rebound valves. Compression valve is a little disk valve that fits in the bottom of the damper tube, rebound valve is in the piston.

Pretty neat little shocks...if someone knew what they were doing they could tune them I'm sure. The valves have all kinds of springs and washers in them...I have no idea what they do, but when I put it all back together it worked just like a new set.

FR,
I took them apart because it was handling like crap.

Thanks bros.
JohnnyB