Valve Springs; Cylinders; Cylinder Arrangement - Yamaha YZF-R1 2004 Service Information

Item

Valve springs

Free length
Intake
Exhaust
Installed length (valve closed)
Intake
Exhaust
Compressed spring force
(installed)
Intake
Exhaust
Spring tilt
Intake
Exhaust
Winding direction (top view)
Intake
Exhaust

Cylinders

Cylinder arrangement

Bore stroke
Compression ratio
Bore
Max. out-of-round
7
ENGINE SPECIFICATIONS
Standard
39.3 mm (1.55 in)
39.3 mm (1.55 in)
32.7 mm (1.29 in)
32.8 mm (1.29 in)
145.9 X 167.9 N (14.88 X 17.12 kg,
32.80 X 37.74 lb)
164.1 X 188.9 N (16.73 X 19.26 kg,
36.89 X 42.46 lb)
SSS
SSS
Clockwise
Clockwise
Forward-inclined, parallel 4-cylinder
77.0 mm 53.6 mm (3.03
12.4 : 1
77.00 X 77.01 mm (3.0315 X 3.0319 in)
SSS
2-6
SPEC
Limit
37.3 mm (1.47 in)
37.3 mm (1.47 in)
SSS
SSS
SSS
SSS
2.5_/1.7 mm
(0.07 in)
2.5_/1.7 mm
(0.07 in)
SSS
SSS
SSS
SSS
2.11 in)
SSS
SSS
0.005 mm
(0.0002 in)