Yamaha MT 10 2016 User Manual

ENGINE INSPECTION
5-1
EAS20041
ENGINE INSPECTION
EAS30249
MEASURE THE COMPRESSION PRESSURE
The following procedure applies to all of the cyl-
inders.
TIP
Insufficient compression pressure will result in a
loss of performance.
1. Measure:
• Valve clearance
Out of specification  Adjust.
Refer to “ADJUSTING THE VALVE CLEAR-
ANCE” on page 3-5.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Remove:
• Rider seat
• Air scoop/Air scoop stay
Refer to “GENERAL CHASSIS (1)” on page
4-1.
• Fuel tank cover
Refer to “GENERAL CHASSIS (2)” on page
4-13.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Air filter case
Refer to “GENERAL CHASSIS (3)” on page
4-20.
• Air cut-off valve
Refer to “AIR INDUCTION SYSTEM” on
page 7-15.
• Ignition coils
• Spark plugs
Refer to “CAMSHAFTS” on page 5-9.
NOTICE
ECA13340
Before removing the spark plugs, use com-
pressed air to blow away any dirt accumulat-
ed in the spark plug wells to prevent it from
falling into the cylinders.
4. Install:
• Compression gauge “1”
5. Measure:
• Compression pressure
Out of specification  Refer to steps (c) and
(d).
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a. Set the main switch to “ON”.
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
WARNING
EWA17100
To prevent sparking the plug, remove all ig-
nition coil couplers and fuel injector cou-
plers before cranking the engine.
TIP
The difference in compression pressure be-
tween cylinders should not exceed 100 kPa (1
kgf/cm², 15 psi).
c. If the compression pressure is above the
maximum specification, check the cylinder
head, valve surfaces and piston crown for
carbon deposits.
Carbon deposits  Eliminate.
d. If the compression pressure is below the min-
imum specification, pour a teaspoonful of en-
gine oil into the spark plug bore and measure
again.
Refer to the following table.
Compression gauge
90890-03081
Engine compression tester
YU-33223
Compression pressure
1305–1680 kPa/250 r/min (13.1–
16.8 kgf/cm²/250 r/min, 185.6–
238.9 psi/250 r/min)
1

Yamaha MT 10 2016 Specifications

General

Displacement	998 cc
Bore x Stroke	79.0 mm x 50.9 mm
Maximum Power	118.0 kW (160.4PS) @ 11, 500 rpm
Fuel System	Fuel Injection
Starter System	Electric
Transmission	6-speed
Final Transmission	Chain
Front Tire	120/70 ZR17M/C (58W)
Rear Tire	190/55 ZR17M/C (75W)
Length	2, 095 mm
Width	800 mm
Height	1, 110 mm
Seat Height	825 mm
Wheelbase	1, 400 mm
Minimum Ground Clearance	135 mm
Wet Weight	210 kg
Fuel Tank Capacity	17 liters
Engine Type	Liquid-cooled, 4-stroke, DOHC, inline 4-cylinder
Compression Ratio	12.0:1
Torque	111 Nm @ 9, 000 rpm
Front Suspension	Telescopic forks, Ø 43 mm
Rear Suspension	Link-type suspension
Front Brake	Dual 320mm hydraulic disc, ABS
Rear Brake	Hydraulic disc, 220 mm
Frame	Aluminum Deltabox