Yamaha FZ1 User Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
EAU03329
Checking the spark plugs
The spark plugs are important engine
components, which are easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plugs 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.
To remove a spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plugs
1. Check that the porcelain insulator
around the center electrode on
each spark plug is a medium-to-
light tan (the ideal color when the
motorcycle is ridden normally).
2. Check that all spark plugs installed
in the engine have the same color.
NOTE:
_
If any spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have a
Yamaha dealer check the motorcycle.
_
3. Check each spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replace
it if necessary.
1. Spark plug cap 1. Spark plug wrench
Specified spark plug:
CR9E (NGK) or
U27ESR-N (DENSO)
U5LV12.book Page 10 Thursday, June 27, 2002 5:49 PM

Yamaha FZ1 Specifications

General

Displacement	998cc
Bore x Stroke	77.0 mm x 53.6 mm
Compression Ratio	11.5:1
Fuel Delivery	Fuel Injection
Transmission	6-speed
Final Drive	Chain
Front Tire	120/70-ZR17
Rear Tire	190/50-ZR17
Engine Type	Liquid-cooled, 4-stroke, DOHC, inline 4-cylinder
Ignition	TCI
Front Suspension	43mm inverted fork, fully adjustable
Rear Suspension	Single shock, adjustable preload and rebound damping
Front Brakes	Dual 320mm disc
Rear Brakes	245mm disc
Wheelbase	1, 460 mm (57.5 in)
Seat Height	815 mm (32.1 in)
Fuel Capacity	18 liters (4.8 gallons)
Curb Weight	487 lb
Torque	106 Nm (78.2 ft lbs) @ 8, 000 rpm
Length	2, 140 mm (84.3 in)
Width	770 mm (30.3 in)
Ground Clearance	135mm (5.3 inches)
Wet Weight	487 lb