Frame changes over the years???

[m_mcgranahan]

Hi,

Just curious are there any big differences between the "01 fx 400 chassy and the 02-03 frames?

Thanks

God bless...

Mark

[Canniboomer]

Early frame?
-- Holes not drilled out for Nerf-bar pass-through, but that is easily done if you need to.
-- Narrower lug-span at the A-Arm mounts -- that is significant, since you must use the single steel sleeve bushings
with our Stock A-Arms, instead of the later dual T-bushings. The T-bushings really protect the frame better from indention wear at the bushing contact. But anyway, just keep in mind that swapping A-arms can involve swapping bushings, and electing to instead grind the lugs out wider is a HUGE pain -- that Aluminum is really tough! For aftermarket A-Arms that use different types of spacers, bushings, heims, hardwashers, that narrower spacing at the frame might not be of any concern at all.
-- Cast miter sections in the mainframe rear-upper bend, but later single miter joints have not shown to be a problem yet anyway.

Some later '03 frames don't have the headlight-mounting lugs, since the bulbs on some models were hung by the light covers.

[m_mcgranahan]

hey Dave

thanks for the info> I measured 2 frames and the old frame was ~`1.75 in and the newer wa ~`1.90 in so you are right one about the a-arm mounts. It really seems like that is the biggest issue. I'm just trying to chose which frame to use for the MX quad.

Thanks

God bless....


Mark

[cannondale27]

It's possible to take a bit off of the t bushings and the nylon bushings to make them fit 02 frame. Well worth the trouble to do since the other setup doesn't work well at all.