Yamaha YZF-R7 User Manual

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ELEC
IGNITION SYSTEM
BAD
NOTE:
• Before troubleshooting, remove the following part(-s):
1)fuel tank
2)air filter case
3)bottom cowling
4)front cowling
5)rear cowling
• Troubleshoot with the following special tool(-s).
Replace the ECU.
Ignition checker
90890-06754
Pocket tester
90890-03112
MEASURING THE IGNITION SPARK GAP
The following procedure applies to all of
the spark plugs.
• Disconnect the ignition coil from the spark
plug.
• Connect the ignition checker 1 as shown.
2 Ignition coil
• Set the main switch to “ON”.
• Measure the ignition spark gap a.
• Crank the engine by pushing the start
switch and gradually increase the spark
gap until a misfire occurs.
• Is there a spark and is the spark gap
within specification?
Yes → Good.
No → Measure the ignition coil resistance.
Minimum ignition spark gap
6 mm (0.24 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