I agree with you about putting the 5.6 rate spring on my brother's bike after doing a little more research. According to racetech I should be using about a 4.6, which is stock on a 125. I happen to have a 2001 yz125 which is stock and it feels good. I am wondering if I couldn't get a stock 4.6, 125 spring and put it on. I compared the specs. on the two springs (250 vs. 125) and it looks as though it will work.
Does anyone know for sure?
Another thing is that according to the racetech site the stock 4.9 spring on my brothers bike should be perfect for him, however when we set the sag it is awfully low (compressed quite a bit) and seems to bottom out on him.
bclapham - how much do you weigh (if you don't mind me asking)? I would like to get his bike set up nice while I am at it and maybe a 5.2 would work for him, but then again we ride a lot of woods and natural whoops at Croom here in Florida and not a lot of Motocross.
Thanks for all the replys guys, I know I ask a lot of questions but I enjoy learning as much as I can about these things.