Checking The Engine Idling Speed - Yamaha TMAX 2020 Service Manual

Last digit
0, 1, 2
3, 4, 5, 6
7, 8, 9
TIP
Refer to the following table for the available
valve pads.
Valve pad range
Valve pad thickness
Available valve pads
Example:
Valve pad number = 158
Rounded value = 160
New valve pad number = 160
f. Install the new valve pad and the valve
lifter.
TIP
• Lubricate the valve pad with molybdenum
disulfide oil.
• Lubricate the valve lifter (Top side) with molyb-
denum disulfide oil.
• Lubricate the valve lifter (Outer side) with en-
gine oil.
• The valve lifter must turn smoothly when rotat-
ed by hand.
• Install the valve lifter and the valve pad in the
correct place.
g. Install the exhaust and intake camshafts,
timing chain and camshaft caps.
Camshaft cap bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
TIP
• Refer to "CAMSHAFTS" on page 5-12.
• Lubricate the camshaft lobes, camshaft jour-
nals and camshaft cap with molybdenum disul-
fide oil.
• First, install the exhaust camshaft.
• Turn the crankshaft clockwise several full turns
to seat the parts.
h. Measure the valve clearance again.
Rounded value
0
5
10
Nos. 120–240
1.20–2.40 mm
(0.047–0.094 in)
25 thicknesses in
0.05 mm (0.002 in)
increments
PERIODIC MAINTENANCE
i. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance ad-
justment steps until the specified clearance
is obtained.
8. Install:
• All removed part
TIP
For installation, reverse the removal procedure.
9. Adjust:
• Throttle grip free play
Refer to "CHECKING THE THROTTLE
GRIP" on page 3-33.
EAS31017

CHECKING THE ENGINE IDLING SPEED

TIP
Prior to checking the engine idling speed, the
throttle body synchronization should be adjusted
properly, the air filter element should be clean,
and the engine should have adequate compres-
sion.
1. Start the engine and let it warm up for several
minutes.
2. Check:
• Engine idling speed
Out of specification  Go to next step.
Engine idling speed
1100–1300 r/min
3. Check:
• ISC (Idle Speed Control) learning value
"00" or "01"  Check the intake system.
"02"  Clean the throttle bodies.
Refer to "CHECKING AND CLEANING THE
THROTTLE BODIES" on page 7-10.
a. Connect the YDT.
Use the diagnostic code number "67".
Refer to "DIAGNOSTIC CODE: SENSOR
OPERATION TABLE" on page 9-58.
b. Check the ISC (Idle Speed Control) learn-
ing value.
3-8