[SilentBiker]

OK,

I ride a 2003 SGS Expert (small 17"). It's the freeride bike. I put a '04 Boxxer Race up front and a '05 Fox Pro-Pedal shock (w/ 600 lb spring) on the rear. I weigh about 170 lbs.

My first problem is that when I have the shock in the 7" position, (the rear suspension is adjustable from 6"-7" of rw travel) the shock bottoms EXTREMLY easily. I've ridden a friends SGS which is a medium frame (19"?) and he has it in the 7" position and it feels fine. So, I'm riding mine in the 6" position until I can figure out what to do.

My other problem is with the fork. I know that a lot of you will say it's a crummy fork and all, but I'd like some helpful input rather than calling my fork names. lol. At a higher rate of speed, on sharp bumps, the fork spikes (To clarify: it feels like it is bottoming while not using all of the 7" of travel.).

So my questions are as follow:

Shock related:
1: Why the heck does my shock bottom?
2: Does any one else have this problem with their SGS?

Fork related:
1: I've read some peoples opinions on why it spikes, but does anyone have a scientific reason as to why it spikes? Is it because of poor valving or something similar?
2: What are the ways to fix this? Changing the oil weight? Changing the oil level? Drilling any passages larger in the valving? Just buying different internals?
3: Any online information on fixing this problem in the ’04 boxxer race?

Thank you guys for your time... I hope this wasn't too long.

-Carl

 

[SilentBiker]

Well, I found some stuff right near the top here on Ride Monkey about the Boxxer fork, but any input is still aprecciated.

-Carl

 

[Jm_]

adjustable travel is nice, but since it completely changes your leverage ratio, you NEED a different spring for the different travel setting. Sometimes you can use your current spring and just turn up your "anti-bottom" adjustment like on a 5th element or fox DHX, but even still, you'd be better off just getting the right spring rate. What works in one travel settings is not gaurenteed to (and usually will not) work in the other travel setting. You have to kind of choose which one you are going to use most of the time, and get the right spring for it. When using a fox vanilla shock, this is all the more true due to no-progression adjustments.

On the boxxer race, there isn't much you can do. There's the rebound valve modification, but open the thing up and you'll see a very simple rebound "damper", and absolutely nothing in the other leg. There simply isn't much in there. There's no compression damper.

 

[biker3]

but thats usually what happens to most boxxers especially races. Due to their lack of adjustabilty and poor damping at high speeds the fork spikes as you said. You can do the drilling which seems to be a somewhat easy process but I don't know much about or you can buy the romic internals which improve the overall suspension action and I believe replace the rebound.

in the rear is the fox a DHX or just a RC or R? If its a DHX use the bottem out resistance adjuster to fix that but if its just an R or RC then i would suggest tightening the preload or getting a heavier spring.

good luck man

Btw ive got a great condition slider plus for sale for $300. Andrew mueller knows me so if ur interested just PM me. hahaha super spamage but good luck with ur bike.

 

[Jm_]

but thats usually what happens to most boxxers especially races. Due to their lack of adjustabilty and poor damping at high speeds the fork spikes as you said. You can do the drilling which seems to be a somewhat easy process but I don't know much about or you can buy the romic internals which improve the overall suspension action and I believe replace the rebound.

in the rear is the fox a DHX or just a RC or R? If its a DHX use the bottem out resistance adjuster to fix that but if its just an R or RC then i would suggest tightening the preload or getting a heavier spring.

good luck man

Btw ive got a great condition slider plus for sale for $300. Andrew mueller knows me so if ur interested just PM me. hahaha super spamage but good luck with ur bike.

No, the drilling is for fixing the compression flaw on the 03 boxxer team and WC, the boxxer race can not be drilled, but you can install an 04 rebound base valve, which is said to improve the damping.

Preload doesn't help with bottoming, it only sets the correct ride height.

 

[Sherpa]

No, the drilling is for fixing the compression flaw on the 03 boxxer team and WC, the boxxer race can not be drilled, but you can install an 04 rebound base valve, which is said to improve the damping.

So in other words, Boxxers suck :evil: and i should order my Dorado neaky: .

 

[Jm_]

So in other words, Boxxers suck :evil: and i should order my Dorado neaky: .

I'm not allowed to say that.





But yeah. :evil:

 

[binary visions]

I've ridden a friends SGS which is a medium frame (19"?) and he has it in the 7" position and it feels fine.

If your friend has the same SGS model that you do (one of the SGS modesl came with a different length shock than the others - I believe the Team model comes with a longer shock but the same amount of travel), and he also has a 600lb. spring, then your shock is valved wrong and you should send it back to Fox.

The Boxxer Race is the Boxxer Race. It's a cheap fork, like a Jr. T. There's not much you can do except install the new base valve, and even then it's a cheap fork. You get what you pay for, you know?

 

[Sir_Crackien]

btw that frame changes from 5-7" of travel