500cc MBK Booster Stunt

The Booster is the scooter of Italy’s “pino dei palazzi“, but what you see in the photo is not just a simple elaboration: this is a real monster.
Equipping what is left of this MBK Booster Spirit Stunt is the engine from Yamaha’s T-Max 500.

And if that weren’t enough, it has an Akrapovic exhaust to boot.

If you speak Japanese, you will find the full description of it here.