Yamaha TMAX 2020 Service Manual

5-33
CYLINDER AND PISTONS
EAS30293
CHECKING THE PISTON PINS
The following procedure applies to both of the
piston pins.
1. Check:
• Piston pin
Blue discoloration/grooves  Replace the
piston pin and then check the lubrication sys-
tem.
2. Measure:
• Piston pin outside diameter “a”
Out of specification  Replace the piston pin.
3. Measure:
• Piston pin bore inside diameter “b”
Out of specification  Replace the piston.
4. Calculate:
• Piston-pin-to-piston-pin-bore clearance
Out of specification  Replace the piston pin
and piston as a set.
EAS30294
INSTALLING THE PISTON AND CYLINDER
The following procedure applies to all of the pis-
tons and cylinders.
1. Install:
• Oil ring expander “1”
• Lower oil ring rail “2”
• Upper oil ring rail “3”
• 2nd ring “4”
• Top ring “5”
(into the piston)
TIP
Be sure to install the top and 2nd rings so that
the manufacturer marks or numbers “a” face up.
2. Install:
• Piston “1”
• Piston pin “2”
• Piston pin clip “3”
a. Bottom of cylinder
b. Upper of cylinder
Piston pin outside diameter
16.995–17.000 mm
(0.6691–0.6693 in)
Limit
16.975 mm (0.6683 in)
Piston pin bore inside diameter
17.002–17.013 mm
(0.6694–0.6698 in)
Limit
17.043 mm (0.6710 in)
a
b
G089003
G089004
Piston-pin-to-piston-pin-bore clearance =
Piston pin bore inside diameter -
Piston pin outside diameter
Piston-pin-to-piston-pin-bore
clearance
0.002–0.018 mm (0.0001–0.0007
in)
b
G089005
G089011
New

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