Yamaha YZF-R7 User Manual

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ENG
VALVES AND VALVE SPRINGS
3. Remove:
• valve cotters 1
NOTE:
Remove the valve cotters by compress-
ing the valve spring with the valve spring
compressor 2 and attachment 3.
Valve spring compressor
90890-04019
Attachment
(for the intake valve)
90890-04114
(for the exhaust valve)
90890-04108
4. Remove:
• upper spring seat 1
• valve springs 2
• lower spring seat 3
• valve 4
• oil seal 5
NOTE:
Identify the position of each part very
carefully so that it can be reinstalled in
its original place.
EB403400
CHECKING THE VALVES AND VALVE
GUIDES
The following procedure applies to all of
the valves and valve guides.
1. Measure:
• valve stem-to-valve guide clearance
Out of specification → Replace the
valve guide.
Valve stem-to-valve guide clearance =
Valve guide inside diameter a –
Valve stem diameter b
Valve stem-to-valve guide
clearance
Intake
0.005 ~ 0.029 mm
(0.0002 ~ 0.0011 in)
<Limit>: 0.06 mm (0.0024 in)
Exhaust
0.010 ~ 0.034 mm
(0.0004 ~ 0.0013 in)
<Limit>: 0.07 mm (0.0028 in)

Yamaha YZF-R7 Specifications

General

Bore x Stroke	80.0mm x 68.6mm
Compression Ratio	11.5:1
Fuel Delivery	Fuel injection
Final Drive	Chain
Front Brakes	Dual 298mm hydraulic disc; ABS
Rear Brakes	245mm hydraulic disc; ABS
Front Tire	120/70ZR17
Rear Tire	180/55ZR17
Wheelbase	54.9 in
Seat Height	32.9 in
Fuel Capacity	3.4 gal
Wet Weight	414 lb
Ground Clearance	5.3 in
Engine Type	Liquid-cooled, 4-stroke, DOHC, 4-valves
Transmission	6-speed
Front Suspension	41mm KYB inverted fork, adjustable preload, rebound and compression damping; 5.1-in travel
Rear Suspension	Single shock, adjustable preload and rebound damping; 5.1-in travel