Yamaha XT660R S Service Manual

3 - 30
CHK
ADJ
CHECKING THE BREATHER HOSE/
CHECKING THE EXHAUST SYSTEM
EAS00098
CHECKING THE BREATHER HOSE
1. Check:
• crankcase-to-crankcase-breather-chamber
hose
1
• air-filter-to-crankcase-breather-chamber
hose
2
Cracks/damage
→
Replace.
Loose connection
→
Connect properly.
CAUTION:
_
Make sure the breather hoses are routed
correctly.
1
2
EAS00099
CHECKING THE EXHAUST SYSTEM
The following procedure applies to all of the
exhaust pipes and gaskets.
1. Check:
• exhaust pipes
1
• mufflers
2
Cracks/damage
→
Replace.
• gaskets
3
Exhaust gas leaks → Replace.
2. Check:
• tightening torques
T
R
.
.
Exhaust pipe nut 4
20 Nm (2.0 m · kg, 14 ft · lb)
Exhaust pipe bolt 5
27 Nm (2.7 m · kg, 19 ft · lb)
Muffler bolt 6
27 Nm (2.7 m · kg, 19 ft · lb)
Exhaust pipe and muffler bolt 7
20 Nm (2.0 m · kg, 14 ft · lb)
Exhaust pipe bolt 8
12 Nm (1.2 m · kg, 8.7 ft · lb)
Exhaust pipe bracket bolt 9
23 Nm (2.3 m · kg, 17 ft · lb)
LT
LT
LT
5
5
7
1
9
6
4
8
3
3
4
6
2
2
7
1
9
3
3
3

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