From icon, on reddit:

This is the full parts list. Fab wise, we cut down the forks about an inch and a half, simplified the wiring, and modded that BSA tank to fit.

With the large fuel pump on the Speedmaster, we had to get creative with placement.

Engine:  • 75 Shot Fork mounted Nitrous Oxide Wet System • Vance and Hines Custom Exhaust • K&N Pod Filters • Custom Ram Air • PBI Sprocket • EK Chain

Suspension and Brakes:  • Progressive 970 Piggyback Rear Suspension • ZX-10 Master Cylinder • EBC Brake Pads • Galfer Brake Discs • M/H Racemaster Drag Slick • Avon Speedmaster front tire • Battery Relocation for traction. Appearance   • BSA C15 250cc 1960 Tank • Tiger 800XC Wheels • Honda Dream Headlight • Zombie Performance Clip-Ons • Biltwell Whiskey Throttle • New Church Moto Seat • Garage 31 Paint • Loaded Gun Customs rear sets