The Marzocchi DJ series of forks are designed, sprung and damped for Dirt Jumping. For general trail riding they will feel harsh. They won't be very active on small chatter bumps etc., and the damper, even with lighter weight oil and set to full open, will likely be a bit on the slow side. As noted they are for Dirt Jumping, and DJ has rather different requirements for suspension fork performance than does trail riding. It will work, but it won't be a nice cushy ride.