Yes, it is removable. You just loosen the nut, the one on swingarm side. Loosen it until it is about all they way off, and you will see a collar that the shock sits on, above this nut. This collar has a cut out, and will slide right off the shaft once you get the tension off, and then the spring. They both come off from the bottom. Good luck!
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes