Yamaha TMAX 2020 Service Manual

5-14
CAMSHAFTS
EAS30256
REMOVING THE CAMSHAFTS
1. Align:
• “I” mark “a” on the generator rotor
(with the stationary pointer “b” on the genera-
tor cover)
a. Turn the crankshaft clockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the “I” mark “a” on the
generator rotor with the stationary pointer
“b” on the generator cover.
TIP
• TDC on the compression stroke can be found
when the cylinder #1 camshaft lobes are
turned away from each other.
• In order to be sure that the piston is at TDC, the
alignment marks “c” on the intake camshaft
sprocket and the alignment marks “d” on the
exhaust camshaft sprocket must align with the
cylinder head mating surface as shown in the
illustration.
2. Remove:
• Timing chain tensioner “1”
• Timing chain tensioner gasket
3. Remove:
• Intake camshaft cap
• Exhaust camshaft cap
• Dowel pin
NOTICE
ECA13720
To prevent damage to the cylinder head,
camshafts or camshaft caps, loosen the
camshaft cap bolts in stages and in a criss-
cross pattern, working from the outside in.
4. Remove:
• Intake camshaft
• Exhaust camshaft
TIP
To prevent the timing chain from falling into the
crankcase, fasten with a wire “1”.
EAS30257
CHECKING THE CAMSHAFTS
1. Check:
• Camshaft lobe
Blue discoloration/pitting/scratches 
Replace the camshaft.
2. Measure:
• Camshaft lobe dimension “a”
Out of specification  Replace the camshaft.
b
a
1
1

Yamaha TMAX 2020 Specifications

General

Displacement	562cc
Bore x Stroke	70.0 mm x 73.0 mm
Compression Ratio	10.9:1
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	V-Belt Automatic
Rear Suspension	Swingarm
Front Brake	Hydraulic dual disc, Ø267 mm
Rear Brake	Hydraulic single disc, Ø282 mm
Front Tyre	120/70R15M/C 56H
Rear Tyre	160/60R15M/C 67H
Overall Length	2, 200 mm
Overall Width	765 mm
Seat Height	800 mm
Wheelbase	1, 575 mm
Wet Weight	218 kg
Fuel Tank Capacity	15 litres
Engine Type	Liquid-cooled, 4-stroke, DOHC, 4-valve
Maximum Torque	55.7 Nm @ 5, 250 rpm
Front Suspension	Telescopic fork
Overall Height	1, 420mm