Engine Specifications - Yamaha SR400 2014 Service Manual

EAS20290

ENGINE SPECIFICATIONS

Engine
Engine type
Displacement
Cylinder arrangement
Bore  stroke
Compression ratio
Standard compression pressure (at sea level)
Minimum–maximum
Starting system
Fuel
Recommended fuel
Fuel tank capacity
Fuel reserve amount
Engine oil
Recommended brand
Type
Recommended engine oil grade
Lubrication system
Engine oil quantity
Quantity (disassembled)
Without oil filter element replacement
With oil filter element replacement
Oil filter
Oil filter type
Oil pump
Oil pump type
Inner-rotor-to-outer-rotor-tip clearance
Limit
Outer-rotor-to-oil-pump-housing clearance
Limit
Oil-pump-housing-to-inner-and-outer-rotor
clearance
Limit
Bypass valve opening pressure
Spark plug(s)
Manufacturer/model
Spark plug gap
Cylinder head
Combustion chamber volume
Warpage limit
ENGINE SPECIFICATIONS
Air cooled 4-stroke, SOHC
3
399 cm
Single cylinder
87.0  67.2 mm (3.43  2.65 in)
8.50 : 1
1050 kPa/700 r/min (10.5 kgf/cm
149.3 psi/700 r/min)
910–1180 kPa/700 r/min (9.1–11.8 kgf/cm
r/min, 129.4–167.8 psi/700 r/min)
Kickstarter
Regular unleaded gasoline (Gasohol (E10) ac-
ceptable)
12.0 L (3.17 US gal, 2.64 Imp.gal)
2.2 L (0.58 US gal, 0.48 Imp.gal)
YAMALUBE
SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
API service SG type or higher, JASO standard
MA
Dry sump
2.40 L (2.54 US qt, 2.11 Imp.qt)
2.00 L (2.11 US qt, 1.76 Imp.qt)
2.10 L (2.22 US qt, 1.85 Imp.qt)
Paper
Trochoid
0.070–0.120 mm (0.0028–0.0047 in)
0.20 mm (0.0079 in)
0.09–0.15 mm (0.0035–0.0059 in)
0.22 mm (0.0087 in)
0.03–0.08 mm (0.0012–0.0032 in)
0.15 mm (0.0059 in)
40.0–80.0 kPa (0.40–0.80 kgf/cm
psi)
NGK/BPR6ES
0.7–0.8 mm (0.028–0.031 in)
63.60–65.60 cm
0.03 mm (0.0012 in)
2-2
2
/700 r/min,
2
, 5.8–11.6
3
(3.88–4.00 cu.in)
2
/700