Tourist Trophy YSP & PRESTO Racing YZF R1 Suzuka8H '05 at Tsukuba Circuit Japan
1Yamaha YZF R1 4th Generation Underseat exhaust pipes and other avant-garde design changes were made for the 2004 R1 to fulfil Yamaha’s motorcycle development ideal at the time of “exciting performance and stylish design”. It featured a bigger bore and shorter stroke spec, and a closed-deck cylinder design to help achieve its higher 12.4:1 compression ratio. To cope with the higher power, this R1 model was the first Yamaha motorcycle to use fracture-split (FS) connecting rods and the fuel-injection system featured sub-throttle valves. An all-new, high-rigidity Deltabox V (Victory) frame was engineered with design feedback from the YZR-M1 MotoGP machine and 3D CAD analysis technology.
Max. power: 172 PS/12,500 rpm Vehicle weight: 172 kg (dry)
YSP Racing Team sponsored by PRESTO Corporation: 12th | Ito Racing・GMD Suzuka: 13th | Phase One Endurance: 18th