Yamaha YZF-R1 Service Manual

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Performance and purpose of kit suspension (Differences compared with standard suspension on commercially available machines) *Spring load: Depends on the stroke. Spring characteristics
Commercially available machine specs
Purpose To increase comfort when riding in urban areas while
preventing bottoming when suddenly riding over a gap while banking on a bend.
Performance/characteristics
At the lowest possible spring setting, the air spring effect is increased depending on the oil level. An oil lock mechanism is fitted for the purpose of preventing bottoming (metal contact).
Problem with circuit Instability caused by excessive front dip movement during the
initial braking period. Stroke cannot be used up. (Stroke stops sharply in the second half of braking.)
Kit suspension specs Linear spring characteristic can use up the entire range of the stroke while exerting the hold
of the initial braking period.
Kit
Commercially available machine
1G
Stroke (mm)
Spring load (N)

Yamaha YZF-R1 Specifications

General

Bore x Stroke	79.0mm x 50.9mm
Compression Ratio	13.0:1
Fuel System	Fuel injection with YCC-T and YCC-I
Final Drive	Chain
Front Tire	120/70ZR17
Rear Tire	190/55ZR17
Wheelbase	55.3 in
Fuel Capacity	4.5 gal
Curb Weight	448 lb
Width	27.2 in
Ground Clearance	5.1 in
Engine Type	Liquid-cooled inline 4-cylinder; DOHC, 4 valves per cylinder
Transmission	6-speed
Clutch	Multiplate slipper clutch
Front Suspension	43mm KYB® inverted fork; fully adjustable
Rear Suspension	KYB® single shock; fully adjustable
Front Brakes	Dual 320mm hydraulic disc; ABS
Rear Brakes	220mm hydraulic disc; ABS