There is really only one original, and that is the 350cc bullet with the 6 volt electrics! The sound from the engine is entirely different from what the modern breed produces and they can be started even with a completely flat battery! The damn things used to be built so rugged that I've used one for more than one "off road" outing without any complaints whatsoever!
Of course the older bullets used to have a slightly complicated rear wheel assembly which meant that a rear flat wasn't something that could be dealt by any ordinary roadside chappie, but that was easily fixed by changing a few parts in favour of the modern avatars.
You buy a bullet for the ride and above all the SOUND... nothing sounds quite like that big single (push rod) four stroke engine... and the new ones completely fail on this count!
![Razz :P](./images/smilies/icon_razz.gif)
Just my $0.02 worth...
Cheers!
Abhijeet