Found this on YouTube:  The Blue Shmoo. Attempting to kick start a Harley 1942 WLA Flathead bobber. Hasn't been registered or run since last rego in 1998. Old over 10 year old 6v battery needed some water and somehow managed to hold a charge. Drained old petrol out of tank and filled with new fuel. Removed bowl bolt from carb and purged carb with fresh fuel. Filled up the oil tank and purged oil line (loosed oil line into oil pump to remove air) removed plugs and cleaned and sprayed some wd40 down the bores before kicking over. Placed hand over carb and gave three prime kicks, turned ignition on and gave her a few kicks and away she went. Unbelievable! Idles nice and smooth, like it was run yesterday.

kick start a Harley 1942 WLA Flathead bobber