Yamaha ’09 YZF-R1 User Manual

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(Setting of back torque limiter of clutch).
A clutch with a back torque limiter mechanism is installed in the YZF-R1 engines. The
operation of the back torque limiter can be adjusted through adjusting: the number of SHIMs
(set up for the kit); the number of springs; the whole thickness of the clutch plate; and the
strength of spring (set up for the kit) of the slipper clutch setting set.
(Recommended setting method)
To begin with, the dimensions of the clutch are re-set to the standard values. (For details,
please refer to the service manual published from YAMAHA MOTOR CO. LTD.
When the slipper clutch setting sets are to be installed, and the number of the SHIMs are
to be three in stack, the setting may be carried out according to the standard.
Spring may be selected from either one of the kit parts or the standard parts. Spring load of
the kit parts is designed to increase in 10% as compared with that of the standard parts.
2
a b
c
1 2
c

Yamaha ’09 YZF-R1 Specifications

General

Bore x Stroke	78.0mm x 52.2mm
Compression Ratio	12.7:1
Fuel Delivery	Fuel injection with YCC-T and YCC-I
Ignition	TCI: Transistor Controlled Ignition
Final Drive	Chain
Front Suspension	43mm inverted fork; fully adjustable, 4.7-in travel
Rear Suspension	Single shock; fully adjustable, 4.7-in travel
Rear Brakes	220mm disc; single-piston caliper
Front Tire	120/70-ZR17
Rear Tire	190/55-ZR17
Wheelbase	55.7 in
Seat Height	32.8 in
Fuel Capacity	4.8 gal
Curb Weight	454 lb
Length	81.5 in
Width	28.1 in
Engine Type	998cc, liquid-cooled inline 4-cylinder DOHC; 16 valves
Transmission	6-speed, multiplate slipper clutch
Front Brakes	Dual 310mm discs; radial-mount forged 6-piston calipers