I have an 01 xr250 which I just started MX racing and am finding it is bottoming out on the big jumps. Actually almost knocked the wind out of me the other day. I want to stiffen it up a bit but there doesn’t appear to be an adjustment, the service manual suggests the bottom bolt may be the key but unsure. I am contemplating going up on the springs stock is suppose to be 0.33, thinking of going to a 0.48. I am 225 ponds. Any other cheaper suggestion would be appreciated.