Hi, this is my first post so hello all, I have several classic bikes, but I've just dug out my 1939 Norton Model 18 and started it up after a few years of inactivity and then remembered why I haven't used it for a while, when its running the kickstart lever falls to the floor but its fine when it not running. I've replaced the spring and re-tensioned it on the shaft, but its still no good. Any ideas anyone? Thanks in advance, Tim.