Yamaha YZF-R7 User Manual

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ENG
VALVES AND VALVE SPRINGS
EB403100
REMOVING THE VALVES
The following procedure applies to all of
the valves and related components.
NOTE:
Before removing the internal parts of the
cylinder head (e.g., valves, valve
springs, valve seats), make sure that the
valves properly seal.
1. Remove:
• valve lifter 1
• valve pad 2
NOTE:
Make a note of the position of each
valve lifter and valve pad so that they
can be reinstalled in their original place.
2. Check:
• valve
(for leakage)
Leakage at the valve seat → Check the
valve face, valve seat, and valve seat
width.
Refer to “CHECKING THE VALVE
SEATS”.
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a. Pour a clean solvent a into the intake
and exhaust ports.
b. Check that the valves properly seal.
NOTE:
There should be no leakage at the valve
seat 1.
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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