Rear spring length

Hussy77 · Jan 15, 2014

Hi guys I've just bought a 2004 fe450 and love it but only problem I have is I'm 18st and need a rear spring to match my weight...ktech have told me I need a 63-250-100 but the manual states that my spring should be 260mm so was just wondering if any of you guys could help?
Regards Ronnie

Johnf3 · Jan 15, 2014

Either one will work without issue. The 260mm spring will give you a little more preload adjustment, but as long as you get the right spring you should only have to run a few mm of preload anyway to get your proper sag numbers.

I don't know what 18 stone is but a 6.3 on a 2004 Husaberg is way too light for any rider, I don't care if you only weigh 18 pebbles.

edelweiss · Jan 16, 2014

Progressive springs are at least 1cm longer most of the time. I have no idea what 18st means, but for your orientation (if you know what 100kg means and given it is your weight), you need approximately: WP 76/95-260 (progressive) or WP 88-250 (linear spring).

Hussy77 · Jan 16, 2014

Thanks for the replays guys, I'm going to get the 63-250-100 as it is rated between 90kg and 110kg.

edelweiss · Jan 17, 2014

or from factory connection FCW-3 (for 90-100kg rider) or FCW-4 (for 110kg rider). It is a slightly progressively wound spring.

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Rear spring length

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