I got a set of used ohlins forks for my gen 1 zx10r. Before I installed them I took them apart and changed the oil with new ohlins fork oil and changed the springs for my weight. After I installed the forks and started riding the bike there seems to be what feels like a vibration coming from the fork legs at certain rpm ranges. Its almost like the fork spring is vibrating against the fork outer tube. Has anyone experienced this?