The 48 closed chamber Marzochi's are the first forks that I havn't had to revalve or respring. I only weigh 150lbs though. In my opinion these are the best forks out there. You do want to take them apart though and clean them out and inspect them. Have had a few of them that had some internal issues right from the factory. They also assemble them with a thick Vaseline type grease that has to affect the valveing.