Bolognia-based titanium experts NCR have recently revealed their M16 special - a Ducati Desmosedici MotoGP replica tuned and lavished with carbon-fibre and titanium to reduce weight to an absolute minimum.
It may be their most radical bike yet, but that's not to say their previous efforts weren't already special.
Here's some of our favourites:
Based on a Ducati 1000SS, the tuned 100bhp air-cooled engine only has to move 145kg of honed track bike.
Mike Hailwood TT
A tribute to Mike The Bike's TT comeback in 1978. 130bhp, 136kg and the most delectable titanium/carbon parts.
A tribute to the 1977 Daytona superbike race-winning 750SS, the Sport 1000 is tuned to 110bhp, weighing just 145kg.