2016 YAMAHA SR400 gas type

Instrument and control functions
3-10
1
2
3
4
5
6
7
8
9
10
11
12
13
14 curs, use a gasoline of a different brand
or premium unleaded fuel. Use of un-
leaded fuel will extend spark plug life
and reduce maintenance costs.
Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that contain-
ing methanol. Gasohol containing
ethanol can be used if the ethanol con-
tent does not exceed 10% (E10). Gas-
ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
EAU39453
Fuel tank breat
her/overflow
hose
Before operating the motorcycle:
Check the fuel tank breather/over-
flow hose connection.
Check the fuel tank breather/over-
flow hose for cracks or damage,
and replace it if necessary.
Make sure that the end of the fuel
tank breather/overflow hose is not
blocked, and clean it if necessary.
1. Fuel tank breather/overflow hose
1
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Periodic maintenance and adjustment
6-10
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2
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14 4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Install the oil filler cap.
To change the engine oil (with or
without oil filter element replace-
ment) 1. Start the engine, warm it up for several minutes, and then turn it
off.
2. Place an oil pan under the engine to collect the used oil.
3. Remove the oil filter element cover bleed bolt and its gasket, and the
oil filter element drain bolt to drain
the oil from the oil filter element
chamber. 4. Remove the engine oil drain bolt
and its gasket to drain the oil from
the crankcase.
5. Remove the engine oil filler cap, the engine oil tank drain bolt and
its gasket to drain the oil from the
oil tank.
1. Engine oil filler cap
2. Dipstick
3. Maximum level mark
4. Minimum level mark
3
4
1
2
1. Oil filter element cover bleed bolt
2. Gasket
3. Oil filter element drain bolt
1. Gasket
2. Engine oil drain bolt (crankcase)
1
2
3
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8-1
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Specifications
EAU69993Dimensions:
Overall length: 2085 mm (82.1 in)
Overall width: 750 mm (29.5 in)
Overall height:
1095 mm (43.1 in)
Seat height: 785 mm (30.9 in)
Wheelbase: 1410 mm (55.5 in)
Ground clearance:
130 mm (5.12 in)
Minimum turning radius: 2.4 m (7.87 ft)
Weight:
Curb weight:
174 kg (384 lb)
Engine:
Combustion cycle:4-stroke
Cooling system:
Air cooled
Valve train: SOHC
Number of cylinders: Single cylinder
Displacement:
399 cm
3
Bore  stroke:
87.0  67.2 mm (3.43  2.65 in)
Compression ratio: 8.5 : 1
Starting system:
Kickstarter
Lubrication system: Dry sump
Engine oil:
Recommended brand:
YAMALUBE
SAE viscosity grades: 10W-40
Recommended engine oil grade:
API service SG type or higher, JASO stan-
dard MA
Engine oil quantity:
Oil change:2.00 L (2.11 US qt, 1.76 Imp.qt)
With oil filter removal:
2.10 L (2.22 US qt, 1.85 Imp.qt)
Air filter:
Air filter element:Oil-coated paper element
Fuel:
Recommended fuel:
Regular unleaded gasoline (Gasohol [E10]
acceptable)
Fuel tank capacity:
12 L (3.2 US gal, 2.6 Imp.gal)
Fuel reserve amount: 2.2 L (0.58 US gal, 0.48 Imp.gal)
Fuel injection:
Throttle body:
ID mark: 2RD1 00
Spark plug(s):
Manufacturer/model:NGK/BPR6ES
Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
Clutch:
Clutch type:Wet, multiple-disc
Drivetrain:
Primary reduction ratio:
2.567 (77/30)
Final drive: Chain
Secondary reduction ratio: 2.947 (56/19)
Transmission type:
Constant mesh 5-speed
Gear ratio: 1st:
2.357 (33/14)
2nd: 1.556 (28/18)
3rd: 1.190 (25/21)
4th: 0.917 (22/24)
5th: 0.778 (21/27)
Chassis:
Frame type:Semi double cradle
Caster angle: 27.7 
Trail:
111 mm (4.4 in)
2RD-28199-E1.book 1 ページ ２０１５年９月３日　木曜日　午後３時４２分