400ex suspention chassie Q's

[250rforlife]

kk im redoin my bike this winter. new topend. but im doing some gncc races this summer , but majorly just intermediate- harsh trail riding. i have a stock frame no gussets. ill have 450r shocks revalved for my weight. do i have to worry about my frame cracking? im doing no jumps over 30ft. thanks!

[slightlybent47]

I wouldn’t think so, I have been racing mx on a stock frame for going on 4 years now with no issues at all. I jump 50 footers all the time so unless you’re a big guy I think you’ll be fine.

[slightlybent47]

Ok let me add that riding conditions are not all the same so if your riding in a rocky area I think you may have more stress on the frame. Also if those 30 footers are with no landing ramp and your landing on flat ground you may have an issue. If you come up short on a jump and case it on some rocky ground that could be a problem.
I will add that I have cased it lots of times on some big jumps and it’s holding up.

[SpasticR450]

I had a lot of hard landings on my 400 chassis Because stock shocks at the time and never one crack or bend and im talking landings that when I landed all 4 tires would bounce back up off the ground.

[-TheDude-]

if your gonna be racing get your rear shock rebuilt and get a gt thunder xc link, so your rear end wont bounce all over the place. call greg at greg atv he is an awesome shock dude (740) 622-9988 tell him greg from omr told you to call he will hook you up

[CJM]

Originally posted by -TheDude-
if your gonna be racing get your rear shock rebuilt and get a gt thunder xc link, so your rear end wont bounce all over the place. call greg at greg atv he is an awesome shock dude (740) 622-9988 tell him greg from omr told you to call he will hook you up

Quick Q, could you use a XC linkage with a stock 400ex rear shock setup? GT Thunder says otherwise but I wanted real world info. Im not sure the extended travel of the linkage would work to well with my skid and GT Thunder says you should use an extended shock.

The front rides great w/450R shocks, but the rear still bounces on me to much in really rough stuff.

[slightlybent47]

I picked up a good used Elka shock and had it rebuilt and it work a bit better then the stocker. The biggest deference was in cornering; it stays much flatter and corners much better. I did not notice a big deference in the way it handles the woops and bumps though.

[CJM]

The whoops and bumps are what kills me, the rear wants to jump up in the air like crazy over very harsh terrain unless I take it easier.

[slightlybent47]

Have you tried adjusting the rebound and or the compression?

[CJM]

Originally posted by slightlybent47
Have you tried adjusting the rebound and or the compression?

Yea, I adjusted it softer than harder to see if it mattered and even lowered everything a good 1/4 inch.

Im thinking I need to give it more, right now the rear is 1.5 turns out each.