engine YAMAHA YZ65 2018 Owner's Guide

Specifications
9-1
9
Dimensions:
Overall length:1615 mm (63.6 in)
Overall width:
760 mm (29.9 in)
Overall height: 1000 mm (39.4 in)
Seat height: 755 mm (29.7 in)
Wheelbase:
1140 mm (44.9 in)
Ground clearance: 265 mm (10.43 in)
Wei ght:
Curb weight:
61 kg (134 lb)
Maximum rider weight:
50.0 kg (110 lb)
ng ine:
Combustion cycle:
2-stroke
Cooling system:
Liquid cooled
Number of cylinders: Single cylinder
Displacement: 65 cm³
Bore × stroke:
43.5 × 43.6 mm (1.71 × 1.72 in)
Compression ratio: 8.1–9.6 : 1
Starting system: Kickstarter
Lubrication system:
Premix lubrication
Engine oil:
Engine oil:
YAMALUBE 2R
Recommended brand:
YAMALUBE
Transmission oil:
Type: Motor oil SAE 10W-30 type SE or higher or
Gear oil SAE 85W GL-3
Quantity: 0.50 L (0.53 US qt, 0.44 Imp.qt)
Coolant quantity:
Radiator (including all routes):0.38 L (0.40 US qt, 0.33 Imp.qt)
Air filter:
Air filter element:Wet element
Fuel:
Recommended fuel:Premium unleaded gasoline (Gasohol [E10]
acceptable)
Fuel tank capacity: 3.5 L (0.9 US gal, 0.8 Imp.gal)
Car buretor:
Type × quantity:
PWK28 × 1
Spark plu g(s):
Manufacturer/model:
NGK/BR9ECM
Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
Clutch:
Clutch type:Wet, multiple-disc
Drivetrain:
Primary reduction ratio:
3.611 (65/18)
Final drive: Chain
Secondary reduction ratio: 3.357 (47/14)
Transmission type:
Constant mesh 6-speed
Gear ratio: 1st:
2.455 (27/11)
2nd: 1.882 (32/17)
3rd: 1.529 (26/17)
4th:
1.263 (24/19)
5th: 1.095 (23/21)
6th: 0.960 (24/25)
Chassis:
Frame type:Semi double cradle
Caster angle: 26.4 °
Trail:
64 mm (2.5 in)
UBR880E0.book Page 1 Friday, February 16, 2018 8:32 AM

Consumer information
10-1
10
EAU26365
Id entification num bers
Record the vehicle identification num-
ber and the engine serial number in the
spaces provided below for assistance
when ordering spare parts from a
Yamaha dealer or for reference in case the vehicle is stolen.
VEHICLE IDENTIFICATION NUMBER:
ENGINE SERIAL NUMBER:
EAU26401Vehicle i dentification num ber
The vehicle identification number is
stamped into the steering head pipe.
Record this number in the space pro-
vided.
TIP
The vehicle identification number is
used to identify your motorcycle and
may be used to register your motorcy-
cle with the licensing authority in your
area.
EAU26442En gine serial num ber
The engine serial number is stamped
into the crankcase.
1. Vehicle identification number
1
1. Engine serial number
1
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11-1
11
Index
A
Air filter element, cleaning .................... 7-10
B
Brake and clutch levers, checking and
lubricating .......................................... 7-24
Brake fluid, changing ........................... 7-20
Brake fluid level, checking ................... 7-19
Brake lever ............................................. 4-2
Brake lever free play, checking ............ 7-17
Brake pedal ............................................ 4-3
Brake pedal, checking and lubricating .......................................... 7-24
C
Cables, checking and lubricating ......... 7-23
Carburetor, adjusting ........................... 7-12
Care ........................................................ 8-1
Clutch lever ............................................ 4-1
Clutch lever free play, adjusting ........... 7-16
Coolant ................................................... 7-8
D
Drive chain, cleaning and lubricating ... 7-22
Drive chain slack .................................. 7-21
E
Engine break-in ...................................... 6-3
Engine idling speed .............................. 7-12
Engine serial number............................ 10-1
Engine, starting a warm ......................... 6-2
Engine stop switch ................................. 4-1
F
Front and rear brake pads, checking ... 7-18
Front fork, adjusting ............................... 4-9
Front fork, bleeding .............................. 4-10
Front fork, checking ............................. 7-26
Fuel......................................................... 4-4
Fuel cock ................................................ 4-6
Fuel tank breather hose ......................... 4-6
Fuel tank cap.......................................... 4-3
H
Handlebar switch ................................... 4-1
I
Identification numbers.......................... 10-1
K
Kickstarter .............................................. 4-7
L
Labels, location ...................................... 1-1
M
Matte color, caution ............................... 8-1
P
Parking ................................................... 6-5
Part locations ......................................... 3-1 Periodic maintenance and lubrication
chart ..................................................... 7-2
R
Rear suspension, lubricating ................ 7-25
S
Safety information................................... 2-1
Seat......................................................... 4-8
Shifting .................................................... 6-2
Shift pedal............................................... 4-2
Shift pedal, checking ............................ 7-18
Shock absorber assembly, adjusting ... 4-11
Sidestand .............................................. 4-15
Spark plug, checking .............................. 7-6
Specifications ......................................... 9-1
Starter (choke) knob ............................... 4-7
Starting and warming up a cold engine ................................................... 6-1
Steering, checking ................................ 7-26
Storage ................................................... 8-3
Supporting the motorcycle ................... 7-27
Swingarm pivots, lubricating ................ 7-25
T
Throttle grip and cable, checking and lubricating ........................................... 7-23
Throttle grip free play, adjusting ........... 7-13
Tires ...................................................... 7-14
Transmission oil ...................................... 7-7
Troubleshooting .................................... 7-30
Troubleshooting charts ......................... 7-31
V
Vehicle identification number ............... 10-1
W
Wheel bearings, checking..................... 7-27
Wheel (front).......................................... 7-28
Wheel (rear) ........................................... 7-29
Wheels .................................................. 7-16
Y
YPVS system ........................................ 4-16
UBR880E0.book Page 1 Friday, February 16, 2018 8:32 AM