TABLE OF CONTENTS
SAFETY INFORMATION
.................. 1-1
Further safe-riding points ................ 1-5
DESCRIPTION
.................................. 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instruments................. 2-3
INSTRUMENT AND CONTROL
FUNCTIONS
....................................... 3-1
Immobilizer system ......................... 3-1
Main switch/steering lock ................ 3-2
Indicator and warning lights ............ 3-3
Speedometer .................................. 3-5
Tachometer .................................... 3-5
Multi-function display ...................... 3-5
Anti-theft alarm (optional) ............... 3-9
Handlebar switches ...................... 3-10
Front brake lever .......................... 3-11
Rear brake lever ........................... 3-12
Rear brake lock lever .................... 3-12
ABS (for ABS models) .................. 3-13
Fuel tank cap ................................ 3-14
Fuel ............................................... 3-15
Catalytic converters ...................... 3-16
Seats ............................................ 3-17
Adjusting the rider seat ................. 3-18
Storage compartments ................. 3-19
Adjusting the shock absorber
assemblies ................................ 3-21
Sidestand ...................................... 3-21Ignition circuit cut-off system ........ 3-22
FOR YOUR SAFETY –
PRE-OPERATION CHECKS
............. 4-1
OPERATION AND IMPORTANT
RIDING POINTS
................................. 5-1
Starting the engine ......................... 5-1
Starting off ...................................... 5-2
Acceleration and deceleration ........ 5-2
Braking ........................................... 5-3
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-4
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
ADJUSTMENT
................................... 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance chart for
the emission control system ....... 6-3
General maintenance and
lubrication chart .......................... 6-4
Removing and installing
cowlings and panels ................... 6-7
Checking the spark plug ............... 6-10
Engine oil and oil filter
element ..................................... 6-12
Final transmission oil .................... 6-15
Coolant ......................................... 6-16Air filter elements and check
hoses and V-belt case air
filter element ............................. 6-17
Checking the throttle cable free
play ........................................... 6-20
Valve clearance ........................... 6-20
Tires ............................................. 6-21
Cast wheels ................................. 6-22
Front and rear brake lever free
play ........................................... 6-23
Adjusting the rear brake lock
lever cable ................................ 6-24
Checking the front and rear
brake pads ................................ 6-24
Checking the brake fluid level ...... 6-25
Changing the brake fluid .............. 6-26
Checking and lubricating the
cables ....................................... 6-26
Checking and lubricating the
throttle grip and cable ............... 6-27
Lubricating the front and rear
brake levers .............................. 6-27
Checking and lubricating the
centerstand and sidestand ....... 6-28
Checking the front fork ................. 6-28
Checking the steering .................. 6-29
Checking the wheel bearings ....... 6-29
Battery .......................................... 6-30
Replacing the fuses ..................... 6-31
Replacing a headlight bulb .......... 6-33
Tail/brake light .............................. 6-34
OPERATION AND IMPORTANT RIDING POINTS
5-4
1
2
3
4
5
6
7
8
9
EAU16841
Engine break-in
There is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1600 km (1000 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAU34321
0–1000 km (0–600 mi)
Avoid prolonged operation above 4000
r/min.
NOTICE:
After 1000 km (600
mi) of operation, be sure to replace
the engine oil, final transmission oil
and the oil filter element.
[ECA12931]
1000–1600 km (600–1000 mi)
Avoid prolonged operation above 6000
r/min.
1600 km (1000 mi) and beyond
The vehicle can now be operated nor-
mally.
NOTICE
ECA10310
Keep the engine speed out of
the tachometer red zone.
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-
cle.
EAU17213
Parking
When parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10311
Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.
Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.
Do not park near grass or other
flammable materials which
might catch fire.
PERIODIC MAINTENANCE AND ADJUSTMENT
6-20
1
2
3
4
5
6
7
8
9
8. Install the V-belt case air filter ele-
ment by installing the screws.
NOTICE:
Make sure that the
V-belt filter element is properly
seated in its case.
[ECA12941]
9. Install the V-belt air filter case cov-
er by installing the screws.
10. Install the left air filter case cover.
11. Install the panel.
12. Install the cowling.
EAU21382
Checking the throttle cable
free play
The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
EAU21401
Valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
1. Throttle cable free play
1
8-1
2
3
4
5
6
7
89
SPECIFICATIONS
EAU2633X
Dimensions:
Overall length:
2230 mm (87.8 in)
Overall width:
780 mm (30.7 in)
Overall height:
1380 mm (54.3 in)
Seat height:
760 mm (29.9 in)
Wheelbase:
1565 mm (61.6 in)
Ground clearance:
120 mm (4.72 in)
Minimum turning radius:
2600 mm (102.4 in)
Weight:
With oil and fuel:
YP400 220.0 kg (485 lb)
YP400A 223.0 kg (492 lb)
Engine:
Engine type:
Liquid cooled 4-stroke, DOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
395 cm
3
Bore
×
stroke:
83.0
×
73.0 mm (3.27
×
2.87 in)
Compression ratio:
10.60 :1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:
Recommended brand:
YAMALUBE
Type:
SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
Recommended engine oil grade:
API service SG type or higher, JASO stan-
dard MA
Engine oil quantity:
Without oil filter element replacement:
1.50 L (1.59 US qt, 1.32 Imp.qt)
With oil filter element replacement:
1.70 L (1.80 US qt, 1.50 Imp.qt)
Final transmission oil:
Type:
YAMALUBE 10W-40 or SAE 10W-30 type
SE motor oil
Quantity:
0.25 L (0.26 US qt, 0.22 Imp.qt)
Cooling system:
Coolant reservoir capacity (up to the maxi-
mum level mark):
0.32 L (0.34 US qt, 0.28 Imp.qt)
Radiator capacity (including all routes):
1.57 L (1.66 US qt, 1.38 Imp.qt)
Air filter:
Air filter element:
Oil-coated paper element
Fuel:
Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
14.0 L (3.70 US gal, 3.08 Imp.gal)
Fuel injection:
Throttle body:
ID mark:
5RUG 20
Spark plug (s):
Manufacturer/model:
NGK/CR7E
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Clutch:
Clutch type:
Dry, centrifugal automatic
Transmission:
Primary reduction system:
Helical gear
Primary reduction ratio:
31/14 (2.214)
Secondary reduction system:
Helical gear
-20 -10 0
10 20 30
40
50 ˚C
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
INDEX
A
ABS (for ABS models) ............................. 3-13
ABS warning light (for ABS models) .......... 3-4
Acceleration and deceleration ................... 5-2
Air filter elements and check hoses
and V-belt case air filter element ........... 6-17
Anti-theft alarm (optional) .......................... 3-9
Auxiliary light bulb.................................... 6-36
B
Battery ..................................................... 6-30
Brake fluid, changing ............................... 6-26
Brake fluid level, checking ....................... 6-25
Brake lever, front ..................................... 3-11
Brake lever, rear ...................................... 3-12
Brake levers, lubricating .......................... 6-27
Braking ...................................................... 5-3
C
Cables, checking and lubricating ............. 6-26
Care ........................................................... 7-1
Catalytic converters ................................. 3-16
Centerstand and sidestand, checking
and lubricating ....................................... 6-28
Coolant .................................................... 6-16
Cowlings and panels, removing and
installing .................................................. 6-7
D
Dimmer switch ......................................... 3-10
E
Engine break-in ......................................... 5-4
Engine oil and oil filter element................ 6-12
Engine stop switch................................... 3-10
Engine trouble warning light ...................... 3-3
F
Final transmission oil ............................... 6-15Front and rear brake lever free play ........ 6-23
Front and rear brake pads, checking....... 6-24
Front fork, checking ................................. 6-28
Front turn signal light ............................... 6-34
Fuel ......................................................... 3-15
Fuel consumption, tips for reducing .......... 5-3
Fuel tank cap ........................................... 3-14
Fuses, replacing ...................................... 6-31
H
Handlebar switches ................................. 3-10
Hazard switch .......................................... 3-11
Headlight bulb, replacing ......................... 6-33
High beam indicator light ........................... 3-3
Horn switch.............................................. 3-10
I
Identification numbers ............................... 9-1
Ignition circuit cut-off system ................... 3-22
Immobilizer system.................................... 3-1
Immobilizer system indicator light ............. 3-4
Indicator and warning lights....................... 3-3
L
License plate light bulb, replacing ........... 6-35
M
Main switch/steering lock .......................... 3-2
Maintenance and lubrication, periodic ....... 6-4
Maintenance, emission control system ..... 6-3
Matte color, caution ................................... 7-1
Model label ................................................ 9-1
Multi-function display ................................. 3-5
P
Parking ...................................................... 5-4
Part locations............................................. 2-1
Pass switch ............................................. 3-10
R
Rear brake lock lever .............................. 3-12
Rear brake lock lever cable, adjusting .... 6-24
Rider seat, adjusting ............................... 3-18
S
Safe-riding points ...................................... 1-5
Safety information ..................................... 1-1
Seats ....................................................... 3-17
Shock absorber assemblies,
adjusting ............................................... 3-21
Sidestand ................................................ 3-21
Spark plug, checking............................... 6-10
Specifications ............................................ 8-1
Speedometer ............................................ 3-5
Starting off................................................. 5-2
Starting the engine .................................... 5-1
Start switch ............................................. 3-10
Steering, checking .................................. 6-29
Storage ..................................................... 7-3
Storage compartments............................ 3-19
T
Tachometer ............................................... 3-5
Tail/brake light......................................... 6-34
Throttle cable free play, checking ........... 6-20
Throttle grip and cable, checking and
lubricating ............................................. 6-27
Tires ........................................................ 6-21
Tool kit ...................................................... 6-1
Troubleshooting ...................................... 6-36
Troubleshooting charts ........................... 6-37
Turn signal indicator lights ........................ 3-3
Turn signal light bulb (rear), replacing .... 6-34
Turn signal switch ................................... 3-10