2017 YAMAHA YFM90 ECO mode

7-5
7
Pre-operation checks
Always inspect your ATV before use to make sure
that it is safe operating condition. Perform the pre-
operation checks listed on page 5-1. Follow the
maintenance schedules and procedures as de-
scribed in the “Periodic Maintenance and Adjust-
ment” section of this manual.
WARNING! Failure
to inspect the ATV before riding it or failure to
maintain it properly increases the possibility of
an accident and equipment damage.
[EWB01433]
Speed limiter
For beginning riders, riders less experienced with
this model, or whenever limited speed is desir-
able, the throttle lever housing is equipped with a vehicle speed limiter. The speed limiter keeps the
throttle from fully opening, even when the throttle
lever is pushed to the maximum. Turning in the
adjusting screw limits th
e maximum engine power
available and decreases the maximum speed of
the ATV. Turning in the adjusting screw decreases
top speed, and turning it out increases top speed.
(See page 4-3.)
This model also has an engine speed limiter plate
to limit the amount of engine power available.
Yamaha recommends that all beginning riders start off with the engine speed limiter plate in-
stalled and the vehicle speed limiter adjusting
screw turned in to limit the amount of speed avail-
able while they learn. The vehicle speed limiter
may be gradually adjusted to increase maximum
speed as the beginner becomes more familiar with
operating the ATV. Parents should decide when to
adjust the ATV for more power as their young-
ster’s riding skills improve. Once the ATV rider can
operate with skill at the top speed permitted by
adjusting the vehicle speed limiter alone, the en-
gine speed limiter plate can be removed. Since re-
moval of this plate will result in a significant
increase in power, turn the vehicle speed limiter

10-2
10
Transmission oil:Type:SAE 80W-90
Quantity:
0.35 L (0.37 US qt, 0.31 Imp.qt)Air filter:Air filter element:Wet elementFuel:Recommended fuel:Regular unleaded gasoline only
Fuel tank capacity: 6.6 L (1.74 US gal, 1.45 Imp.gal)
Fuel reserve amount:
0.9 L (0.24 US gal, 0.20 Imp.gal)Carburetor:Type × quantity:
H66D x 1Spark plug (s):Manufacturer/model: NGK/CR6HSA
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:Dry, centrifugal automaticTransmission:Secondary reduction system:
Chain drive
Secondary reduction ratio: 35/14 (2.500) Transmission type:
V-belt automatic
Operation: Centrifugal automatic type
Chassis:Frame type:Steel tube frame
Caster angle: 3.40 °
Trail:
19.8 mm (0.78 in)Front tire:Type:Tubeless
Size:
AT18 x 7-8
Manufacturer/model: DURO/DI2017Rear tire:Type:
Tubeless
Size: AT18 x 9-8
Manufacturer/model: DURO/DI2016Loading:Maximum loading limit:82.0 kg (181 lb)
(Total weight of rider, cargo, accessories, and tongue)
UBD361E0.book Page 2 Monday, January 25, 2016 10:53 AM

10-3
10
Tire air pressure (measured on cold tires):Recommended:Front: 24.0 kPa (0.240 kgf/cm², 3.5 psi)
Rear: 24.0 kPa (0.240 kgf/cm², 3.5 psi)
Minimum:
Front: 20.7 kPa (0.207 kgf/cm², 3.0 psi)
Rear:
20.7 kPa (0.207 kgf/cm², 3.0 psi)Front wheel:Wheel type:Panel wheel
Rim size:
8 x 5.5ATRear wheel:Wheel type:Panel wheel
Rim size:
8 x 5.5ATFront brake:Type:Mechanical leading, trailing drum brake
Operation:
Right hand operationRear brake:Type:Mechanical leading, trailing drum brake
Operation:
Left hand operation
Front suspension:Type:Swing axle
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel: 126 mm (5.0 in)Rear suspension:Type:
Swingarm
Spring/shock absorber type: Coil spring/oil damper
Wheel travel: 145 mm (5.7 in)Electrical system:Ignition system:CDI
Charging system: AC magnetoBattery:Model:GTX5L-BS
Voltage, capacity: 12 V, 4.0 AhBulb voltage, wattage × quantity:Neutral indicator light:
12 V, 3.5 W × 1
Reverse indicator light: 12 V, 3.5 W × 1
UBD361E0.book Page 3 Monday, January 25, 2016 10:53 AM

11-1
11
EBU26001
CONSUMER INFORMATION
EBU28202Identification numbersRecord the vehicle identification number and
model label information in the spaces provided
below for assistance when ordering spare parts
from a Yamaha dealer or for reference in case the
ATV is stolen.
VEHICLE IDENTIFICATION NUMBER:
MODEL LABEL INFORMATION:EBU26031Vehicle identification number
The vehicle identification number is stamped into
the frame.
TIPThe vehicle identification number is used to iden-
tify your ATV. EBU26051Model label
The model label is affixed at the location in the il-
lustration. Record the information on this label in
the space provided. This information will be need-
ed when ordering spare parts from a Yamaha
dealer.1. Vehicle identification number
1
UBD361E0.book Page 1 Monday, January 25, 2016 10:53 AM