i think the rear shock is bottom out. is there a way to adjust nitrogen on the shock?

 

I recomend you don't try messing with the nitrogen , with the year of your bike I hate to say but your shock may be shot , however all is not lost I belive that model is adjustable and to do so there should be two lock nuts on the bottom of the shock loosen the bottom one and tighten the top one , only go about an inch at a time then test ride if you get it to tight it may throw you over the bars at the worst possable time ,also if you go to honda of troy web sight and look up that shock there will be an exploded veiw that may help show you what I mean. I hope this helps you out bro.