Torsional Springs - BOMBARDIER 1996 Ski-doo MX Z440 Handbook

Section 03 CHASSIS PREPARATION
SPRING RATE = 300 Ibf / in
10 in FREE LENGTH
AOIFITS
So while the soft spring with a lot of preload acted stiffer initially, it's rate allowed it to compress
substantially with increasing loads. But the stiffer rate spring with no preload actually acted softer
at small loadings but then became stiff very quickly as the load increased.

Torsional Springs

A torsional spring acts just like a coil spring but it is shaped differently. It is much more difficult to
measure the rate of a torsional spring because of the lengths of the legs and where the load will be
applied. The rear torsional springs on the S chassis are rated in Ib-ft / degree (pounds-feet per
degree of rotation). Suffice it to say that there are stiffer and softer springs for most applications.
03-14
700
700
400 Ibf, available for
compression (4")
A
4"
INSTALLED
v
700 Ibf, force
O Ibf, preload
.
700 Ibf, available for
compression (2.3")
O Ibf
SPRING RATE = 100 Ibf / in
7 in FREE LENGTH