Operation and important ri din g points
6-3
6
sion, an
d d rive train, which are
not desi gne d to withstand the
shock of shiftin g when the
throttle grip is open.
EAU39912To start out an d accelerate
1. Close the throttle.
2. Shift into first gear and release the shift pedal. NOTICE: Always
close the throttle before shiftin g
g ears, otherwise damag e to the
en gine an d d rive train may re-
sult.
[ECA15462]
3. Open the throttle gradually.
4. Once the motorcycle has reached a speed high enough to change
gears, close the throttle.
5. Shift into second gear and release the shift pedal.
6. Open the throttle gradually.
7. Follow the same procedure when shifting to the next higher gear.
EAU16711To decelerate
1. Close the throttle and apply both the front and the rear brakes to
slow the motorcycle.
2. Downshift through the gears and shift the transmission into the neu-
tral position when the motorcycle
is almost completely stopped.
EAU39921
Engine break-in
There is never a more important period
in the life of your engine than the first 5
hours of riding. It is also important to
accustom the rider to the motorcycle
during this time. Please read the fol-
lowing information carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
5 hours of operation. The various parts
in the engine wear and polish them-
selves to the correct operating clear-
ances. During this period, prolonged
full-throttle operation or any condition
that might result in engine overheating
must be avoided. However, momen-
tary full-throttle operation under load
(i.e., two to three seconds maximum)
does not harm the engine. Each full-
throttle acceleration should be fol-
lowed with a substantial rest period for
the engine. To allow the engine to cool
down from the temporary buildup of
heat, cruise at a lower engine speed.
After the first 5 hours of operation,
thoroughly check the motorcycle for
loose parts, oil leakage and any other
problems. Be sure to inspect and make
adjustments thoroughly, especially ca-
ble and drive chain slack and loose
spokes. In addition, check all fittings
and fasteners for looseness, and tight-
en if necessary.
NOTICE
ECA10271
If any en gine trou ble shoul d occur
d urin g the en gine break-in perio d,
imme diately have a Yamaha dealer
check the vehicle.
UB5186E0.book Page 3 Wednesday, April 22, 2020 9:11 AM
Specifications
9-2
9
Spark plug(s):
Manufacturer/model:
NGK/CR6HSA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:Wet, centrifugal, shoe + multiple-disc
Drivetrain:
Primary reduction ratio:3.722 (67/18)
Final drive: Chain
Secondary reduction ratio:
2.500 (35/14)
Transmission type:
Constant mesh 4-speed
Gear ratio: 1st:
3.167 (38/12)
2nd: 1.941 (33/17)
3rd: 1.381 (29/21)
4th:
1.095 (23/21)
Chassis:
Frame type:Backbone
Caster angle:
26.0 °
Trail: 60 mm (2.4 in)
Front tire:
Type:
With tube
Size: 2.50-14 4PR
Manufacturer/model: CHENG SHIN/C-803
Speed rating:
120 km/h (75 mph)
Rear tire:
Type:With tube
Size:
3.00-12 4PR
Manufacturer/model: CHENG SHIN/C-803 Speed rating:
120 km/h (75 mph)
Tire air pressure (measure d on col d
tires):
Front:
100 kPa (1.00 kgf/cm², 15 psi)
Rear: 100 kPa (1.00 kgf/cm², 15 psi)
Front wheel:
Wheel type: Spoke wheel
Rim size: 14 x 1.40
Rear wheel:
Wheel type:
Spoke wheel
Rim size: 12 x 1.60
Front brake:
Type:
Mechanical leading trailing drum brake
Rear brake:
Type:
Mechanical leading trailing drum brake
Front suspension:
Type:Telescopic fork
Spring: Coil spring
Shock absorber:
Hydraulic damper
Wheel travel: 115 mm (4.5 in)
Rear suspension:
Type:
Swingarm
Spring: Coil spring
Shock absorber: Gas-hydraulic damper
Wheel travel:
110 mm (4.3 in)
Electrical system:
System voltage:12 V
Ignition system:
CDI
Charging system: AC magneto
UB5186E0.book Page 2 Wednesday, April 22, 2020 9:11 AM
