1974 Yamaha OW13
Sand cast magnesium inner and outer cases..titanium hardware including the kickstarter.
Sand cast magnesium upper triple clamp.  The lower clamp is billet aluminum
The front and rear hubs are both sand cast magnesium.  A little over a pound lighter than stock.
Front forks are works Kayaba.  Lower legs are machined out of billet aluminum
Aluminum bodied rear shock