|The NField Gear catalog provides a spotter's guide to Royal Enfields.|
The guide is meant to help customers determine what parts will fit their Royal Enfield. But it also serves, in effect, as a spotter's guide to models. Photos of engine and transmission types are on Page 134 of the catalog.
From the "oldest" (not that old: modern U.S. imports commenced in 1995) to the newest, here's how the guide breaks them down:
Bullet, kickstart only, 4-speed: Original Bullet frame with iron-barrel motor, carburetted engine, 4-speed transmission and kick start only.
Bullet, electric start, 4-speed: As above but with electric start added.
Bullet, electric start, 5-speed: As above but with 5-speed transmission (said to currently be the most common model seen).*
Bullet Sixty-5: Rare. As above, with iron barrel, electric start and 5-speed transmission but "sixties" look and colors.*
Electra: Different frame than Bullet, with Lean Burn (AVL) motor.
Bullet Lean Burn (AVL): As above but with original Bullet frame and body work!
G5: Electra frame and body work with new Unit Constructed Engine (UCE). This motor comes with fuel injection and electric start.
C5: Totally new frame with UCE motor.
C5 Special: As above but with 19-inch front wheel.
B5: UCE engine fitted into classic Bullet frame and (350) body work.
* It seems to me that the Bullet Sixty-5 was the first to the U.S. with the five-speed transmission.