Have just got a wm20 1940 model and having trouble removing the spindle from the front wheel , I want to replace the bearings , have removed the speedo drive and adjustment nuts , which side does it come out of ? The engine is in terrible state but I have a zm20 the only difference I can see it hasn’t a connection for a copper pipe to the clutch case , would that be a problem?
The bike is complete but a big project .
I would definitely not replace a wartime engine for a post war one. The worth of your M20 will drop instantly. I would put all effort in restoring/ an overhaul of the original wartime engine. Maybe you could use some of the ZM20 engine parts for the restoration of the wartime engine?
If your front wheel is as original, tap the spindle out from the offside, ie to come out from the brake side. There's a shoulder on the spindle that the brakeside bearing inner sits against. Take a look at the Draganfly site: there's an exploded diagram that shows the hub assembly.
If it's all seized up, it may pay to soak it in parafin for a few days first...