sachs shock rebound prob

[wence]

G'day ,
Today I road a great little track which had just about everything, sand, hardpack, creeks , very tight single trail etc etc .
I was playing around with the forks and shock and had it about right .
I just did a slight adjustment on the fork and shock and did a quick lap and a half when the bike went weird.
Rear shock started to act like a pogo, no rebound damping.
Played around when the lap was finished and could not get the rebound damping to work, even to the extreme of fully in(still pogoing).
Had a rest and a drink and got talking about suspension and a mate told me to ride his crf 450 with suspension done by a certain tuer who does a lot of pros gear.
Got back after a lap and went to get back on mine and it wa shard as a rock.
Adjusted it back and got it reasonable for the last half of the day but was just wondering what the deal was?
Anyone had a similar problem with a standard sachs shock?
Cheers Mark

[noobi]

It sounds like the second problem here

Is your Sachs shock grunting, moaning or groaning? Did it turn into an expensive spring guide, like a BIG pogo stick?

Recently we’ve had some of these coming through the shop, there are 2 unique and separate issues that we have resolved for the Sachs shock. It isn’t typical to see both issues on the same shock and it isn’t common enough to condemn the whole lot of them and prescribe the repair for every Sachs shock that comes through our door.

The first issue is a horrible vibrating grunt noise emanating from the shock on the rebound stroke. You can usually change the pitch or harmonics of it by increasing or decreasing the rebound damping, you know, that adjustment screw at the bottom of your shock? It sounds BAD, really bad! Not to worry though because we have isolated the problem and have a proper fix for this, and no, it wont cost a body part to repair it. The charge is just a normal shock service. We’ll even kick in the 25 cent countermeasure repair part no charge, such a deal we have for you!

The second issue is a loss of damping, usually when the shock gets heated up. About 5 minutes into your favorite ride, it will act like a pogo stick! Let it cool down and all is well....... but only for a few minutes until it heats back up. You can try to increase the damping, but it isn’t going to help. Not at all. You have a pogo stick, you need to get it repaired. We have an updated part in stock ready for you, its about $20 plus the cost of a normal shock service and it won’t happen again.

http://www.lt-racing.com/html/sachss...on_topics.html

[wence]

I thought I had read about it not long ago.Cheers Noobi.
So what is the deal and who do I contact as the shock has just been serviced?
Thanks in advance,
Mark

[noobi]

If it was me, firstly I would take it on another unimportant ride and check if it does it again to maybe confirm the problem like on the website then I would get in contact with Les at LTR and ask if you can buy the part. He is on here under the name LT-Race (I think), or just email LTR

But thats just me

[wence]

This was the second time .
I rode it at the same place a few weeks ago and the same thing occurred.
I'll give Les a call or an email.
Thanks for the help mate,
Mark

[bchatt]

My Sachs shock blew apart at 50 hours (07 EC250). The circlip that holds the seal and everything else in was driven outwards on rebound.
I took it back to the dealer as the bike was still under warrenty - they said there is a known fault with these shocks, they loose damping, and they suspected this blowout was a result of that. They fitted what was described as a "special rebuild kit" with a beefed up seal and maybe a bladder as well but I'm not 100% sure about that. Anyway, the main point is that it is a know fault and there is a known remedy. So far it seems to be OK - I'm at about 100 hours now.

[wence]

Spoke to Les and he has sorted it out.
Very helpful.As you say it is to do with the seal etc and is a known fault.
Should have it sorted very soon.
Thanks again must go to Les.
People like him make it a pleasure to own a Gas gas and be part of the gas gas family.
Cheers Mark

[bchatt]

That's great news. Did he happen to say what the fault is, and what the fix is?

[wence]

There is a problem with the seal in this type of shock. He has a replacement that fixes the problem.
Cheers Mark

[nick790]

I had this problem this weekend, what should I do?