Engine Specifications - Yamaha ’09 YZF-R1 Kit Manual

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Engine Specifications

Spec
Displacement
Bore/stroke
Maximum engine speed
(limiter controlled speed)
Compression ratio
Valve timing (event angle)
Squish height
Clearance between valve
and piston
Valve (tappet) clearance
SB
998cc
78.0 x 52.2 mm
13750 rpm
12.8:1
(13.2:1 will result from
0.2mm cylinder head
surface grinding.)
INT 110°
EXT 110°
0.65 mm (Minimum)
INT 1.0 mm (ATDC10°)
EXT 2.0 mm (BTDC10°)
INT 0.17 – 0.23 mm
EXT 0.27 – 0.33 mm
– 1 –
ST
998cc
78.0 x 52.2 mm
13750 rpm
12.7:1
105°
105°
0.775 mm (Minimum)
1.16 mm (ATDC10°)
2.14 mm (BTDC10°)
0.11 – 0.20 mm
0.21 – 0.25 mm