
Table of contents
Location of important la bels ........... 1-1
Safety information ............................ 2-1
Description ....................................... 3-1
Left view ......................................... 3-1
Right view ....................................... 3-2
Controls and instruments ............... 3-3
Instrument an d control functions ... 4-1
Handlebar switch............................ 4-1
Speed limiter and power reduction 
plate ............................................ 4-1
Front brake lever ............................ 4-2
Rear brake lever ............................. 4-3
Fuel tank cap .................................. 4-3
Fuel ................................................. 4-4
Fuel tank breather hose.................. 4-5
2-stroke engine oil .......................... 4-6
Fuel cock ........................................ 4-6
Starter (choke) lever ...................... 4-7
Kickstarter ...................................... 4-7
Seat ................................................ 4-8
Cable lock (for Europe) ................... 4-9
For your safety – pre-operation 
checks ............................................... 5-1
Operation an d important ri din g 
points ................................................ 6-1
Starting and warming up a cold  engine ......................................... 6-1
Starting a warm engine .................. 6-2
Starting off ...................................... 6-2
Acceleration and deceleration ........ 6-3
Braking ........................................... 6-3
Engine break-in .............................. 6-4
Parking ........................................... 6-4
Perio dic maintenance an d 
a d justment ........................................ 7-1
Owner’s tool kit .............................. 7-2
Periodic maintenance chart for the  emission control system ............. 7-3
General maintenance and 
lubrication chart .......................... 7-4 Checking the spark plug ................. 7-6
Removing the power reduction 
plate ............................................. 7-7
Transmission oil .............................. 7-8
Middle and final gear cases .......... 7-10
Cleaning the air filter element ....... 7-10
Cleaning the spark arrester ........... 7-11
Adjusting the carburetor ............... 7-12
Adjusting the engine idling  speed ......................................... 7-13
Checking the throttle grip free 
play ............................................ 7-14
Tires .............................................. 7-14
Panel wheels ................................. 7-16
Adjusting the front and rear brake  lever free play ............................ 7-17
Checking the front and rear brake 
shoes ......................................... 7-18
Checking and lubricating the  cables ........................................ 7-19
Checking and lubricating the  throttle grip and cable ............... 7-19
Adjusting the Autolube pump ....... 7-20
Lubricating the front and rear 
brake levers ............................... 7-20
Checking and lubricating the 
centerstand ................................ 7-21
Checking the front fork ................. 7-21
Checking the steering ................... 7-22
Checking the wheel bearings ........ 7-22
Front wheel ................................... 7-23
Rear wheel .................................... 7-24
Troubleshooting ............................ 7-27
Troubleshooting chart ................... 7-28
Motorcycle care an d stora ge .......... 8-1
Matte color caution ......................... 8-1
Care................................................. 8-1
Storage............................................ 8-3
Specifications ................................... 9-1
Consumer information ................... 10-1
Identification numbers .................. 10-1
In dex ................................................ 11-1
U2SA85E0.book  Page 1  Friday, May 11, 2018  9:07 AM 

Description
3-1
3
EAU63371
Left view
1234
56
1. Spark plug (page 7-6)
2. Fuel cock (page 4-6)
3. Throttle stop screw (page 7-13)
4. Air filter element (page 7-10)
5. Kickstarter (page 4-7)
6. Centerstand (page 7-21)
U2SA85E0.book  Page 1  Friday, May 11, 2018  9:07 AM 

Instrument and control functions
4-6
4
EAU13454
2-stroke en gine oil
Make sure that there is sufficient 2-
stroke engine oil in the oil tank. Add the
recommended 2-stroke engine oil as
necessary.
NOTICE
ECA16671
Make sure that the 2-stroke en gine
oil tank cap is properly installe d.
EAU40702
Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has two positions:
S (stop)
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not run-
ning.
O (on)
With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
1. 2-stroke engine oil tank cap
2. Minimum level mark
Recommen ded  oil:
See page 9-1.
Oil quantity: 0.30 L (0.32 US qt, 0.26 Imp.qt)
2 1
1. Arrow mark pointing to “S” (stop)
1. Arrow mark pointing to “O” (on)
1
1
U2SA85E0.book  Page 6  Friday, May 11, 2018  9:07 AM 

Periodic maintenance an d a djustment
7-3
7
EAU69180
Perio dic maintenance chart for the emission control system
TIP
Items marked with an asterisk should be performed by a Yamaha dealer as they
require special tools, data and technical skills.
4 *Carburetor  Check engine idling speed and 
starter operation.
 Adjust if necessary.
 Clean.
5 *Cylinder head and 
exhaust system  Check for leakage.
√
 Tighten if necessary.
 Decarbonize if necessary.
6
*Spark arrester  Clean.√
NO. ITEM CHECK OR MAINTENANCE JOB
1 month3 months
6 months
6 months12 months
1
*Fuel line  Check fuel hoses for cracks or 
damage.√√√ √
√√√ √
√√
√
√
√√
√
√
√√
√ Replace if necessary.
2Spark plug  Check condition.
 Adjust gap and clean.
 Replace if necessary.
3Air filter element
 Clean with solv
ent.
 Replace if necessary.
THEREAFTER  EVERYINITIAL
U2SA85E0.book  Page 3  Friday, May 11, 2018  9:07 AM 

11-1
11
Index
A
Acceleration and deceleration ................ 6-3
Air filter element, cleaning .................... 7-10
Autolube pump, adjusting..................... 7-20
B
Brake lever, front .................................... 4-2
Brake lever, rear...................................... 4-3
Brake levers, lubricating ....................... 7-20
Brake shoes, checking ......................... 7-18
Braking.................................................... 6-3
C
Cable lock (for Europe) ........................... 4-9
Cables, checking and lubricating ......... 7-19
Carburetor, adjusting ............................ 7-12
Care ........................................................ 8-1
Centerstand, checking and 
lubricating ........................................... 7-21
E
Engine break-in....................................... 6-4
Engine idling speed .............................. 7-13
Engine oil ................................................ 4-6
Engine serial number ............................ 10-1
Engine, starting a warm .......................... 6-2
Engine stop switch ................................. 4-1
F
Front and rear brake lever free play, adjusting ............................................. 7-17
Front fork, checking .............................. 7-21
Fuel ......................................................... 4-4
Fuel cock ................................................ 4-6
Fuel tank breather hose .......................... 4-5
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
Maintenance and lubrication, periodic ... 7-4
Maintenance, emission control  system .................................................. 7-3
Matte color, caution ................................ 8-1
Middle and final gear cases .................. 7-10
P
Parking .................................................... 6-4
Part locations .......................................... 3-1
Power reduction plate, removing............ 7-7
S
Safety information .................................. 2-1
Seat ........................................................ 4-8
Spark arrester, cleaning ....................... 7-11
Spark plug, checking ............................. 7-6
Specifications ......................................... 9-1
Speed limiter and power reduction 
plate ..................................................... 4-1
Starter (choke) lever ............................... 4-7
Starting and warming up a cold 
engine .................................................. 6-1
Starting off.............................................. 6-2
Steering, checking................................ 7-22
Storage ................................................... 8-3
T
Throttle grip and cable, checking and  lubricating .......................................... 7-19
Throttle grip free play, checking........... 7-14
Tires ...................................................... 7-14
Tool kit.................................................... 7-2
Transmission oil ..................................... 7-8
Troubleshooting ................................... 7-27
Troubleshooting chart .......................... 7-28
V
Vehicle Emission Control Information  label (For Canada) .............................. 10-1
Vehicle identification number ............... 10-1
W
Wheel bearings, checking .................... 7-22
Wheel (front) ......................................... 7-23
Wheel (rear) .......................................... 7-24
Wheels .................................................. 7-16
U2SA85E0.book  Page 1  Friday, May 11, 2018  9:07 AM