Re starting your Velo....interesting in that I find my Mk 2 4G the easiest of bikes to start (those 250cc cylinders I suppose).
I have had a Venom for 2 years, and finally got the Half Nelson on the starting procedure, thanks to local club members.
The few old bikes Ive owned definitely dont need such a strict "routine".
Velos are almost impossible to start by just giving them a bloody good kick, but if you follow the procedure they start quite easily (assuming everything is working well, sparks and fuel). Also seem quite sensitive to the amount of spark retard you employ at the handlebar lever. That is particular to you and your bike.
Fuel on, and short tickle. They dont want to be flooded.
Full choke for cold start, no choke once warm at all. (Again may be particular to your bike).
Find compression with kick lever.
Let kicker back up all the way.
***Decompress and steadily kick through all the way to the bottom, 6 oclock, not further.***
Kicker back all way to the top.
Tad of throttle.
Kick as hard as you can (no decompressor).
If you over flood the carb, my bike will start with the above procedure but with the throttle fully open.
I find the amount of retard is small, about an 1/8th in gap on the lever boss. But you will find the best for you. If it spits back, which is all mine will do if I dont get it right, I increase the retard by a fraction at a time. I actually have a tiny mark on my lever as a reminder of where it should be.
"The Procedure" is simply setting the piston in the right place so that it hits TDC on the firing stroke towards the bottom of the kick swing.
I bent my kick start shaft trying to fire it up when I first got it, because it would spit back with such force. Also hurt my foot!
But the amazing thing is, a local Velo club member has a fire-breathing Thruxton with high comp pistons and hairy cams etc, and it seemingly starts with no bother because he has the knack.
Good luck, shouldnt say this here, but Velos are lovely bikes too!!
1934 New Imperial 100
1934 Harley Davidson VL