Yamaha FZ1-S User Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
6
To install the panel
Place the panel in the original position,
and then install the screw.
FZ1-S
FZ1-SA
EAU19652
Checking the spark plugs
The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.
1. Panel C
2. Screw
Specified spark plug:
NGK/CR9EK
U3C3E4E0.book Page 8 Friday, July 10, 2009 5:01 PM

Yamaha FZ1-S Specifications

General

Bore x Stroke	77.0 mm x 53.6 mm
Compression Ratio	11.5:1
Fuel System	Fuel injection
Ignition	TCI
Transmission	6-speed
Final Drive	Chain
Front Tire	120/70-ZR17
Rear Tire	190/50-ZR17
Seat Height	815 mm
Wheelbase	1, 460 mm
Length	2, 140 mm
Width	770 mm
Engine Type	Liquid-cooled, 4-stroke, DOHC, 4-valve, inline-four
Rear Suspension	Single shock, adjustable preload and rebound damping
Front Brakes	Dual 320 mm discs, 4-piston calipers
Rear Brakes	245 mm disc, single-piston caliper
Fuel Capacity	18 L
Wet Weight	487 lb