Husqvarna TC 250 2010 Workshop Manual page 274

REAR SUSPENSION
Rear suspension
The rising-rate rear suspension is made up of a shock absorber, a linkage system
and a swinging arm. The spring preload of the shock absorber can be adjusted
to suit riding and terrain conditions. Hydraulic damping is also adjustable using
outer adjuster screws. Periodically check all components for wear.
Part. N. 8000 H1489 (10-2009)
J.4