[JessHerbst]

Since the super meteor is, I think, the only Royal Enfield with them I thought this would be the place for me to ask about upside down forks.
 What are the pros & con of these?

[AzCal Retred]

USD forks are stiffer for the same weight as the larger OD members are in the most stressed position, the top. The lower sliders can get thinner, thus lighter and still be satisfactory.

As the forks moving/oscillating structure is now lighter, unsprung weight is reduced, the suspension becomes more compliant. The front wheel has an easier time following the ground.

As the seals are closer to the ground, there's more opportunity for grit damage. Usually plastic shields are provided to mitigate damage. As the seals are "at the bottom of the oil" a leak can result in dumping most of the damping oil. On the street, a cleaner environment, this seems less an issue than for trail use.

Actual performance is determined by the money, materials & engineering invested. In theory they are inherently a better design.

[JessHerbst]

Thanks!

[gizzo]

USD looks cooler.

[JessHerbst]

USD looks cooler.

I don’t know, they kind of look to me like someone put them together wrong.

[gizzo]

I don’t know, they kind of look to me like someone put them together wrong.

I'm generalising. The average yobbo on the street is easily impressed by things like usd forks, carbon fibre and billet aluminium.
That's who they're pitching the bike at, not an individual with old school tastes from Texas. Sadly.

[NVDucati]

I guess I don't know for sure ...
I don't think there is a USD / dampener-cone system.
So the comparison, as regards performance, is mute. You could spend some off-season chatter comparing USD to RSU with cartridges, I suppose.