I put 7wt in mine and that by many is considered too heavy, 5 wt is optimum. If you have any questions on KLR shock Holycaveman is the guy to address. He is the guru on KLR shock and a great guy to address any tech question too. I built my shock up on mine using a remote fox reservoir with a Race Tech gold valve, and he was of great help. Another tip on the rebound adjust, anything higher than 1 is pretty restrictive. I think you'll find the spring upgrade will be an imense improvement as the stock one is something like 100# too light. The KLR will never be a Husaburg but the spring upgrade makes an imense difference, I think you'll like it.