Yamaha YZF-R1 Service Manual

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7. High-lift Camshafts
This camshaft has a cam profile etc. changed from the STD one.
To adjust the valve timing, use the oval holes of the standard cam sprocket.
TIP
For valve timing adjustment, refer to the KIT TOOL MANUAL.
NOTICE
x When using this camshaft, use the valve spring set 14B-A2110-72.
x When fitting the camshaft, use the slotted holes of the cam sprockets and always set
the timing to match. If otherwise, no intended performance can be expected and
more over, the engine may be damaged.
Parts List
No. PART No. PART NAMEQ’TY REMARKS
114B-12170-71 SHAFT, CAM 1 1 IN T
2 14B-12180-71 SHAFT, CAM 2 1 EXT
90105-07006
14B-12176-00
2
1
USE THESE OVAL HOLES FOR TIMING ADJUSTMENT.
#1CAM
#1CAM
Cylinder head
alignment surface
Sprocket assembly position at top dead center point of #1 cylinder compression

Yamaha YZF-R1 Specifications

General

Bore x Stroke	79.0mm x 50.9mm
Compression Ratio	13.0:1
Fuel System	Fuel injection with YCC-T and YCC-I
Final Drive	Chain
Front Tire	120/70ZR17
Rear Tire	190/55ZR17
Wheelbase	55.3 in
Fuel Capacity	4.5 gal
Curb Weight	448 lb
Width	27.2 in
Ground Clearance	5.1 in
Engine Type	Liquid-cooled inline 4-cylinder; DOHC, 4 valves per cylinder
Transmission	6-speed
Clutch	Multiplate slipper clutch
Front Suspension	43mm KYB® inverted fork; fully adjustable
Rear Suspension	KYB® single shock; fully adjustable
Front Brakes	Dual 320mm hydraulic disc; ABS
Rear Brakes	220mm hydraulic disc; ABS