Yamaha YZFR1Y 2009 Operation manual

Specification for Yamaha R1 engine: engine type liquid cooled engine 4-stroke, DOHC displacement 998.0 cm3 cylinder agreement bent forward in parallel 4-cylinder bore × stroke 78.0 × 52.2 mm (3.07 x 2.06 in) compression ratio compression standard 12.70: 1 pressure (at sea level) 1480 kPa/350 r/min (14.8 kgf/cm2/350 r/min, 210.5 psi/350 r/min) Minimum-Maximum 1290-1660 kPa/350 r/min (12.9-16.6 kgf