i have an 05 crf450r and if i jounce the forks i get a clunk out of the left side fork. it has always done this sence it was new. the dealer (carls cycle sales) said it was just the spring hitting the outer tube under a load. well i just did the front seals and complete bushings and o ring kit from pivot works. i noticed on tear down that the dampner spring has been rubbing on the shaft that runs through it. well i replaced all the parts that came in the kit and the noise went away..........for a few hours. dont know what else to do here to fix this. i am kinda thiking new springs but the other side is loose on there too but it doesn't have any problems. other thought is that i am losing fork oil out of the bottom of the inner tube and dont have enough preasure on the spring to keep it tight.