Yamaha XT660R S Service Manual

5 - 58
ENG
BALANCER DRIVEN GEAR
REMOVING THE BALANCER DRIVEN
GEAR AND BALANCER DRIVE GEAR
1. Straighten the lock washer tab.
2. Loosen:
• balancer driven gear nut 1
• primary drive gear nut 2
NOTE:
Place an aluminum plate a between the teeth
of the balancer driven gear 3 and balancer
drive gear 4.
3. Remove:
• balancer driven gear
• water pump drive gear
• primary drive gear
• balancer drive gear
4
1
a
3
4
2
a
3
CHECKING THE BALANCER DRIVEN
GEAR, WATER PUMP DRIVE GEAR,
PRIMARY DRIVE GEAR, AND BALANCER
DRIVE GEAR
1. Check:
• balancer driven gear
• balancer drive gear
• water pump drive gear
• primary drive gear
Damage/wear → Replace.

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