I bought a used 2003 yz250. When I adjusted the rear shock to get 100mm sag, It has no 10-25mm drop in. It is fully extended. I weight 190lbs without gear. What size spring do I need?
My current spring is silver. Is this the stock color?
If you have no static sag, you need a heavier spring. Check your manual for what is stock. Its probably a 4.8 and the next heavier rate is 5.0.
I have tried the race tech site. According to them, I did not need heavier fork and shock springs, but needed to buy their valving. Well, I had the susp revalved first (not race tech). Huge improvement. Then I bought springs and its even better. I am about your size and have an 02 YZ250.