Futureshock S140 knocking noise

[BigwheelsRbest]

I have a 2010 Futureshock S140 on a SJ FSR 2010 Pro carbon set up. Fork (and shock) was away for a service with Spesh recently, and I've only done a few hours on it since then.

I have a knocking noise that I think is coming from the fork when I get into rough ground. It is quite loud and disconcerting, but I can't find anything loose or wrong with the bike otherwise.

Due for a big trip abroad on it soon so want to get it sorted out, but can't afford to pay the LBS another £200. Any ideas?

[Martin6]

Is the fork topping out on the rebound?

[Biking Brazilian]

Think resetting your negative spring...

[Pete N]

They can tend to top out a bit, especially when new, and after a service. Try slowing the rebound down a bit which may help.

[BigwheelsRbest]

Is the fork topping out on the rebound?

By "topping out" do you mean achieving full travel? If so, no, that's not the cause of the noise, which is more of a persistent knocking sound rather than a just happening once in a while.

[BigwheelsRbest]

Think resetting your negative spring...

How would I do that?

[BigwheelsRbest]

They can tend to top out a bit, especially when new, and after a service. Try slowing the rebound down a bit which may help.

OK thanks Pete - I'll try that

[Biking Brazilian]

How would I do that?

You'd have to take the fork apart. Unless you're very, very comfortable working on these things, I suggest taking it into your dealer for service. The more accommodating Specialized dealers will swap out your fork on the spot (Specialized offers an exchange program).

The rebound solution simply masks the issue; it does not fix it.

[BigwheelsRbest]

You'd have to take the fork apart. Unless you're very, very comfortable working on these things, I suggest taking it into your dealer for service. The more accommodating Specialized dealers will swap out your fork on the spot (Specialized offers an exchange program).

The rebound solution simply masks the issue; it does not fix it.

I can't believe this - it has just come back from a £200 suspension service!

[Pete N]

I can't believe this - it has just come back from a £200 suspension service!

Contact Specialized Uk and speak to the suspension tech, number 2 on the phone option. They will sort the issue and am pretty sure that they won't charge especially as you just had it done . You can send the fork to them directly and have it back within a week.

[DGC]

Not many shops even know how to reset the negative spring on these forks. It is an internal thing, not as easy as pumping more or less neg. pressure in a Rock Shox. It takes a tear down, though easy, and resetting what Specialized calls the "gulp" setting. Once done it takes care of the top out. I have done it many times, lasts a season most of the time, and only once seen a fork come back in less than 4 months before needing it done again. That service should be around $40 or less in US. If too much or a lot of gulp setting is set, there will be more form dive.
If this was done correctly, and still clunks at the top of the stroke, then you might have a bad or needing service damper.