Engine Specifications - Yamaha YZF-R1 Service Manual

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Engine Specifications

Spec
Displacement
Bore/Stroke
Maximum engine speed
(limiter controlled speed)
Compression ratio
(recommended value)
Valve timing (event angle)
Squish height (minimum)
Clearance between valve
and piston (minimum)
Valve (tappet) clearance
SBK
998 cm³
78.0 x 52.2 mm
13800 rpm
13.7:1
(Depend of
head-gasket
and head
cylinder
thickness and
cylinder head
surface
grinding)
INT. 108°
EXT. 110°
0.65 mm
INT. 0.9 mm
(ATDC10°)
EXT. 1.8 mm
(BTDC10°)
INT. 0.17 – 0.23 mm
EXT. 0.27 – 0.33 mm
– 1 –
STK
998 cm³ 998 cm³
78.0 x 52.5 mm 78.0 x 52.2 mm
13800 rpm 13800 rpm
12.9:1 12.7:1
(Depending on
the thickness of
the head
gasket)
103° 105°
103° 105°
0.65 mm 0.75 mm
1.0 mm 1.3 mm
(ATDC10°) (ATDC10°)
2.5 mm 2.8 mm
(BTDC10°) (BTDC10°)
0.11 – 0.20 mm 0.11 – 0.20 mm
0.21 – 0.25 mm 0.21 – 0.25 mm
STD