It's a bird... it's a plane...

It's a Royal Enfield Himalayan motocross bike.

Redline

A flat tracker based on a 2016 Bullet 500 by Frontwheel Motors.

The colorful Goan

 A new factory custom in attractive colors.

Black Mirage and Vikingo

 The new Royal Enfield black mirage has a tank lettering reminiscent of that in the Argentine movie Vikingo.

GRR450 in Argentina

 I had not heard the Guerrilla 450 described as "GRR450" before.