350 Jubilee

I wouldn't bank on this being a 350.

The down tube and headsteady look like they are from Jubilee. The head steady brackets could have been cut off the downtube and welded higher up to accept a taller Navigator barrel/engine. Doubt it.

Or a Jubilee engine as the engine number says.

That rear sprocket looks like Jubilee to me, not the smaller Navigator sprocket for higher gearing.

Centre stand stops are a bit worn as both wheels on the ground.

Tinwork and paint look good. Would look good in a museum.

Peter

Dan & Peter,

The Navigator barrels have 7 cooling fins and from counting the fins on several Jubilee photos I am almost 100% they have 6 which accounts for the difference in stroke and head steady height.  Unless I am very mistaken the bike in the picture above has 6 fins so it has a 250cc not a 350cc engine.   The gap between the top of the heads and tank looks right for a Jubilee engine too - the Navigator looks 'fuller'.     ...................you can tell it is a dark, wet, stormy night out there!!!!

Nick

I am currently building a 350 jubilee as a project and it is possible. getting the crank case bored out slightly to accommodate the larger barrel then the crank and top end can be swapped over and a new head steady will have to be made up.. If you join the Norton lightweight Facebook group or Norton specials group I will be documenting all my progress on these groups 

I'm with Nicholas C. on this, the number of fins on the barrel are the give away. 

I wish I new this when I was buying a Navigator, the first one I bought had a 250cc engine built up around Navigator (19) crank case. 

Oh how I wished for a buyers guide for Jubilees and navigators at that time!

This is a straight forward De/Lux 250cc Norton Jubilee.

There is nothing 350 about it.