i think these are only for the newer 'pro' series.
i'm still looking for older txt [2001] myself
http://www.lewisportusa.com/parts_wheels.htm
Stiffer Springs for Gas Gas
These are for the later Pro models using Marzzochi steel and aluminum forks and the Sachs rear shock. We have 10% or 20% over stock.
$129.95 front pair, $129.95 rear
http://www.gasgas.com/products.htm
Heavier fork springs
For Marzocchi forks, .50kg rate, replaces the standrd springs and plastic preload spacers. 22% stiffer than stock.
Available at:
www.eurodirt.com
Heavier shock spring
22% stiffer shock spring for '06-'08 PRO's
Available at:
www.eurodirt.com