The effort required to pull the handle on my 5 year old XL650 suddenly increased a lot while reloading. I removed the shell plate, platform and primer assembly and the bare main shaft still felt like something was dragging and felt very rough while being raised and lowered. Upon loosening the main shaft set screw a quarter of a turn, all of the extra resistance went away. How tight is the main shaft set screw supposed to be? Maybe adding some grease to the tip of the set screw would solve my problem and allow it to function properly with the set screw fully tightened. Thanks in advance for any input on this problem.