Yamaha XT660R S Service Manual

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ENG
BALANCER DRIVEN GEAR
INSTALLING THE BALANCER DRIVEN
GEAR AND BALANCER DRIVE GEAR
1. Install:
• washer
• balancer drive gear 1
• straight key 2
• balancer driven gear 3
• straight key
• primary drive gear
• water pump drive gear
NOTE:
• Align the punch mark a on the balancer
drive gear with the punch mark b on the bal-
ancer driven gear.
• Install the key with its blunt surface facing c
the crankshaft.
1
3
2
a
b
2
c
2. Install:
• lock washer 1
• primary drive gear nut 2
• lock washer 3
• balancer driven gear nut 4
NOTE:
Place an aluminum plate a between the teeth
of the balancer drive gear and balancer driven
gear.
3. Bend the lock washer tab.
2
1
a
4
a
3
New
T
R
.
.
80 Nm (8.0 m · kg, 58 ft · lb)
New
T
R
.
.
70 Nm (7.0 m · kg, 50 ft · lb)

Yamaha XT660R S Specifications

General

Displacement	660 cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Starter System	Electric
Transmission System	5-speed
Final Drive	Chain
Front Suspension System	Telescopic forks
Front Tyre	90/90-21 M/C 54S
Rear Tyre	130/80-17 M/C 65S
Overall Width	865 mm
Overall Height	1, 230 mm
Seat Height	865 mm
Wheelbase	1, 505 mm
Wet Weight	181 kg
Fuel Tank Capacity	15 litres
Oil Tank Capacity	2.9 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC
Maximum Power	48hp (35kW) @ 6, 000rpm
Frame	Steel diamond
Rear Suspension System	Swingarm, (link suspension)
Front Brake	Single 298mm disc, 2-piston caliper
Rear Brake	Single Disc, 245 mm