Started to mess with my '01 wr250 suspension. the bike is great in the woods and as my speed increased I turned the small dampening and rebound screws in all around, with the exception of the rear dampening on the bottom that I just discovered in the manual. the bike runs great and only on occaision will bottom out in the rear. When i decend short steep hills and hit a small 1-2 ft bump at the bottom of the hill. my question is- Do I still turn the small dampening screws in? or is this a sag adjustment? And...How do I measure the sag? I can't seem to find that information on the search.