[AzCal Retred]

H's carry spares for these, lighter than the UCE or even the new Meteor. The 350 is a bit harder to come by than the 250.

https://denver.craigslist.org/mpo/d/denver-royal-enfield-single/7495537293.html
This mid 1960s Royal Enfield is not a Bullet. Its a unit construction engine that I believe is a 350cc. It does not have a title and is not running but the engine rolls through. Parts bike or return it to the street.

[Adrian II]

These briefly appeared in the UK where they were sold as the Bullet, but not for very long. 1963 or thereabouts? Same forks as the Villiers-powered Turbo Twin, separate headlamp shell/bucket though In suspect it would originally have had a longer MCH56 to incorporate the speedometer.

https://www.ebay.co.uk/itm/325114935636?hash=item4bb25c3954:g:26IAAOSwcRRiOzwp

Bullet Whisperer used the con-rod from one of these in one of his 350 racers.

A.

[royaloilfield]

These where called the "New Bullet" you can tell by counting the fins on the Barrel.  They also had a beefier trans.  They are pretty rare.  I have one and it's alot more fun to ride then the 250gt!  There is an email group for these machines if anyone else has one.  That is a cool tank panel/badge! never seen that before.  custom?   

[Bilgemaster]

Thanks for giving us the "heads up!" That's not an entirely discouraging looking project for someone handy.