Yamaha 1999 YZF-R6 Service Manual

3-11
ADJUSTING THE VALVE CLEARANCE
CHK
ADJ
NOTE:
EB303001
ENGINE
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the
valves.
 Valve clearance adjustment should be made
on a cold engine, at room temperature.
 When the valve clearance is to be measured
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke.
1. Remove:
 rider seat
 fuel tank
Refer to “SEATS” and “FUEL TANK”.
 air filter case
 heat protector plate
Refer to “AIR FILTER CASE AND IGNITION
COILS”.
 bottom cowling
 side cowlings
Refer to “COWLINGS”.
 carburetor assembly
Refer to “CARBURETORS” in chapter 6.
 radiator assembly
Refer to “RADIATOR” in chapter 5.
2. Remove:
 ignition coils
 spark plugs
 cylinder head cover
1
 cylinder head cover gasket
3. Remove:
 pickup coil rotor cover
1

Yamaha 1999 YZF-R6 Specifications

General

Bore x Stroke	65.5 mm x 44.5 mm
Compression Ratio	12.4:1
Ignition	Digital TCI
Transmission	6-speed
Final Drive	Chain
Front Suspension	Telescopic fork
Front Brakes	Dual 298 mm discs
Front Tire	120/60-ZR17
Rear Tire	180/55-ZR17
Wheelbase	1, 380 mm (54.3 in)
Seat Height	820 mm (32.3 in)
Engine Type	liquid-cooled, DOHC, inline 4-cylinder
Rear Suspension	Single shock
Rear Brakes	220mm disc
Fuel Capacity	17 l (4.5 US gal)
Dry Weight	169 kg