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Yamaha r1 2008 Service Manual

Yamaha r1 2008
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VALVES AND VALVE SPRINGS
5-28
EAS24320
CHECKING THE VALVE LIFTERS
The following procedure applies to all of the
valve lifters.
1. Check:
Valve lifter
Damage/scratches Replace the valve
lifters and cylinder head.
EAS24340
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
Valve stem end
(with an oil stone)
2. Lubricate:
Valve stem “1”
Valve stem seal “2”
(with the recommended lubricant)
3. Install:
•Valve1
Lower spring seat “2”
Valve stem seal “3”
Valve spring “4”
Upper spring seat “5”
(into the cylinder head)
NOTE:
Make sure each valve is installed in its origi-
nal place. Refer to the following embossed
marks.
Intake valve: Pink paint mark
Exhaust valve: “4C8”
Install the valve springs with the larger pitch
“a” facing up.
4. Install:
Valve cotters “1”
NOTE:
Install the valve cotters by compressing the
valve spring with the valve spring compressor
“2” and the valve spring compressor attach-
ment “3”.
Spring tilt limit
Spring tilt (intake)
2.5 °/1.7 mm
Spring tilt (exhaust)
2.5 °/1.7 mm
Recommended lubricant
Molybdenum disulfide oil
b. Smaller pitch

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Yamaha r1 2008 Specifications

General IconGeneral
Bore x Stroke77.0 mm x 53.6 mm
Compression Ratio12.7:1
Fuel SystemFuel injection
IgnitionTCI: Transistor Controlled Ignition
Transmission6-speed
Final DriveChain
Front Tire120/70-ZR17
Rear Tire190/50-ZR17
Wheelbase55.7 in
Maximum Power180 hp @ 12, 500 rpm
Engine Type998cc, liquid-cooled, 4-stroke, DOHC, 16-valve, inline-4
Front Suspension43 mm inverted fork, fully adjustable; 4.7-in travel
Rear SuspensionSingle shock; fully adjustable
Front BrakesDual 310 mm disc
Rear Brakes220 mm disc, single-piston caliper
Seat Height32.9 in
Fuel Capacity4.8 gallons
Curb Weight454 lbs
Length81.1 in
Width28.3 in
Height43.7 in
Dry Weight390 lbs

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