Yamaha XT660R S Service Manual

5 - 53
ENG
OIL PUMP
EAS00364
CHECKING THE OIL PUMP
1. Check:
• oil pump driven gear
1
• oil pump housing 1
2
• oil pump housing cover
3
• oil pump housing 2
4
Cracks/damage/wear
→
Replace the defec-
tive part(s).
2. Measure:
• inner-rotor-to-outer-rotor-tip clearance
a
• outer-rotor-to-oil-pump-housing clearance
b
• oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance
c
Out of specification
→
Replace the oil
pump.
1
Inner rotor
2
Outer rotor
3
Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
0.07 ~ 0.12 mm
(0.0028 ~ 0.0047 in)
<Limit>: 0.2 mm (0.008 in)
Outer-rotor-to-oil-pump-housing
clearance
0.03 ~ 0.08 mm
(0.0012 ~ 0.0031 in)
<Limit>: 0.15 mm (0.0059 in)
Oil-pump-housing-to-inner-rotor-
and-outer-rotor clearance
0.03 ~ 0.08 mm
(0.0012 ~ 0.0031 in)
<Limit>: 0.15 mm (0.0059 in)
3. Check:
• oil pump operation
Rough movement
→
Repeat steps (1) and
(2) or replace the defective part(s).

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