re; building 1955 excelsior

[Salmon]

Just bought a 1955 Excelsior 250 in bad nick, hoping to do much of the rebuild myself, but there are things Iwill need help with. If any one has any ideas I would like to here them.
Salmon

[Spanner]

Dear Salmon,  My first road bike was the 250 twin Talisman 2-stroke.  Can't remember much about it other than reliability was not too good.  I remember it smoked a lot which was normal for that engine (a bit like the Ariel Leader & Arrows).  I remember draining the crankcase of excessive oil about every month!! to control the smoke somewhat.
Don't suppose the reg no. is 111SNO, my old bike?
Good luck with the work,
Best wishes, Mark.