Yamaha XT660R S Service Manual

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CHK
ADJ
ADJUSTING THE REAR BRAKE LIGHT SWITCH/
CHECKING THE FRONT AND REAR BRAKE HOSES
1. Check:
• rear brake light operation timing
Incorrect → Adjust.
2. Adjust:
• rear brake light operation timing
▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Hold the main body 1 of the rear brake light
switch so that it does not rotate and turn the
adjusting nut 2 in direction a or b until the
rear brake light comes on at the proper
time.
▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲
Direction a
Brake light comes on
sooner.
Direction b
Brake light comes on
later.
EAS00131
CHECKING THE FRONT AND REAR BRAKE
HOSES
The following procedure applies to all of the
brake hoses and brake hose clamps.
1. Check:
• front brake hose 1
• rear brake hoses 2
Cracks/damage/wear → Replace.
2. Check:
• brake hose clamp
Loose → Tighten the clamp bolt.
3. Hold the motorcycle upright and apply the
brake several times.
4. Check:
• brake hoses
Brake fluid leakage → Replace the dam-
aged hose.
Refer to “FRONT AND REAR BRAKES” in
chapter 4.
1
1
2
2

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