You say your rebound is too slow on the shock - a couple things to consider. 1.what is you rebound adjuster set at (dial on bottom of shock) you will see it if you look down where it bolts to the swingarm, and there is an arrow on lower shock above the dial to show what setting you have it on. The dial has 4 different settings. 1 would be the fastest rebound, and 4 would be slow. You would want to set it to 4 if you are doing a lot of jumping, and going over whoops, as you wouldnt want a fast rebound. For general trail riding I would recommend a 2 or 3. I dont know what 1 would be used for.. 2. If the seal isnt bad on the shock (oil around chrome shaft) It could probly use a re-charge of nitrogen. I believe the cap on the ressy is removable, but have never had one apart on the 200x. You should be able to bring thr shock to a bike shop, and they can re-charge it for 5-10 dollars if they arent trying to rip you off.
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