clutch YAMAHA YBR250 2011 User Guide

PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6
NOTICE
ECA11620


In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.


Make sure that no foreign mate-rial enters the crankcase.
12. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
13. Turn the engine off, and then
check the oil level and correct it if
necessary.
EAU20881
Cleaning the air filter element The air filter should be cleaned at the
specified intervals. It should be cleaned
more frequently when riding in unusual-
ly wet or dusty areas.
1. Remove panel B. (See page 6-6.)
2. Remove the air filter case by re-
moving the screws.
3. Remove the air filter from the case.4. Remove the air filter element from
its guide and clean it with solvent.
After cleaning, remove the remain-
ing solvent by squeezing the ele-
ment.1. Air filter case cover
2. Screw
1. Air filter element
1
U5D1E1E0.book Page 11 Friday, September 5, 2008 1:17 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
6
EAU21960
Cast wheels To maximize the performance, durabil-
ity, and safe operation of your vehicle,
note the following points regarding the
specified wheels.

The wheel rims should be checked
for cracks, bends or warpage be-
fore each ride. If any damage is
found, have a Yamaha dealer re-
place the wheel. Do not attempt
even the smallest repair to the
wheel. A deformed or cracked
wheel must be replaced.


The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.


Ride at moderate speeds after
changing a tire since the tire sur-
face must first be “broken in” for it
to develop its optimal characteris-
tics.
EAU22020
Adjusting the clutch lever free
play The clutch lever free play should mea-
sure 10.0–15.0 mm (0.39–0.59 in) as
shown. Periodically check the clutch le-
ver free play and, if necessary, adjust it
as follows.
1. Loosen the locknut at the clutch le-
ver.
2. To increase the clutch lever free
play, turn the adjusting bolt in di-
rection (a). To decrease the clutch
lever free play, turn the adjusting
bolt in direction (b).
3. Tighten the locknut.
TIPIf the specified free play cannot be ob-
tained as described above or if the
clutch does not operate correctly, have
a Yamaha dealer check the internalclutch mechanism.
1. Locknut
2. Clutch lever free play adjusting bolt
3. Clutch lever free play
U5D1E1E0.book Page 15 Friday, September 5, 2008 1:17 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-23
6
EAU23142
Checking and lubricating the
brake and clutch levers Brake lever
Clutch lever
The operation of the brake and clutch
levers should be checked before each
ride, and the lever pivots should be lu-
bricated if necessary.
EAU23202
Checking and lubricating the
sidestand The operation of the sidestand should
be checked before each ride, and the
sidestand pivot and metal-to-metal
contact surfaces should be lubricated if
necessary.
WARNING
EWA10731
If the sidestand does not move up
and down smoothly, have a Yamaha
dealer check or repair it. Otherwise,
the sidestand could contact the
ground and distract the operator, re-sulting in a possible loss of control.
Recommended lubricants:
Brake lever:
Silicone grease
Clutch lever:
Lithium-soap-based grease
Recommended lubricant:
Lithium-soap-based grease
U5D1E1E0.book Page 23 Friday, September 5, 2008 1:17 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:
2025 mm (79.7 in)
Overall width:
745 mm (29.3 in)
Overall height:
1065 mm (41.9 in)
Seat height:
805 mm (31.7 in)
Wheelbase:
1360 mm (53.5 in)
Ground clearance:
190 mm (7.48 in)
Minimum turning radius:
2395 mm (94.3 in)Weight:With oil and fuel:
154.0 kg (340 lb)Engine:Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
249.0 cm³
Bore × stroke:
74.0 × 58.0 mm (2.91 × 2.28 in)
Compression ratio:
9.80 :1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:Type:
SAE 20W-40 or 20W-50
Recommended engine oil grade:
API service SF, SG type or higher, JASO
standard MA
Engine oil quantity:
Without oil filter element replacement:
1.35 L (1.43 US qt, 1.19 Imp.qt)
With oil filter element replacement:
1.45 L (1.53 US qt, 1.28 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
19.2 L (5.07 US gal, 4.22 Imp.gal)
Fuel reserve amount:
4.5 L (1.19 US gal, 0.99 Imp.gal)
Fuel injection:Throttle body:
Type/quantity:
33EHS-3D01/1Spark plug (s):Manufacturer/model:
NGK/DR8EA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction system:
Spur gear
Primary reduction ratio:
74/24 (3.083)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
44/15 (2.933)
Transmission type:
Constant mesh 5-speed
Operation:
Left foot operation
Gear ratio:
1st:
36/14 (2.571)
2nd:
32/19 (1.684)
3rd:
28/22 (1.273)
4th:
26/25 (1.040)
-20 -10 0
10 20 30
40
50 ˚C
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
U5D1E1E0.book Page 1 Friday, September 5, 2008 1:17 PM

INDEXAAir filter element, cleaning..................... 6-11
Auxiliary light bulb, replacing ................ 6-29BBattery................................................... 6-25
Brake and clutch levers, checking and
lubricating ........................................... 6-23
Brake and shift pedals, checking and
lubricating ........................................... 6-22
Brake fluid, changing ............................ 6-19
Brake fluid level, checking .................... 6-18
Brake lever .............................................. 3-6
Brake pads and shoes, checking .......... 6-17
Brake pedal ............................................. 3-7
Brake pedal position and free play,
adjusting ............................................. 6-16CCables, checking and lubricating .......... 6-21
Care ........................................................ 7-1
Catalytic converter .................................. 3-9
Clutch lever ............................................. 3-6
Clutch lever free play, adjusting ............ 6-15
Cowling and panels, removing and
installing................................................ 6-6DDimmer switch ........................................ 3-5
Display, multi-function ............................. 3-3
Drive chain, cleaning and lubricating .... 6-21
Drive chain slack ................................... 6-19EEngine break-in ....................................... 5-3
Engine idling speed............................... 6-12
Engine oil and oil filter element ............... 6-9
Engine stop switch .................................. 3-5Engine trouble warning light ................... 3-2
FFront fork, checking .............................. 6-24
Fuel......................................................... 3-8
Fuel consumption, tips for reducing........ 5-2
Fuel level warning light ........................... 3-2
Fuel tank cap .......................................... 3-7
Fuses, replacing ................................... 6-27HHandlebar switches ................................ 3-5
Headlight bulb, replacing ...................... 6-28
Helmet holder ....................................... 3-10
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-5IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ................ 3-13
Indicator and warning lights .................... 3-2LLuggage strap holders .......................... 3-12MMain switch/steering lock........................ 3-1
Maintenance and lubrication, periodic .... 6-3
Maintenance, emission control system... 6-2
Model label ............................................. 9-1NNeutral indicator light .............................. 3-2PParking ................................................... 5-3
Part locations .......................................... 2-1
Pass switch............................................. 3-5RRear brake light switch, adjusting ......... 6-17
Rear suspension, lubricating ................ 6-24
SSafety information ................................... 1-1
Seat ....................................................... 3-10
Shifting .................................................... 5-2
Shift pedal ............................................... 3-6
Shock absorber assemblies,
adjusting ............................................. 3-11
Sidestand .............................................. 3-12
Sidestand, checking and lubricating...... 6-23
Spark plug, checking ............................... 6-7
Specifications .......................................... 8-1
Speedometer........................................... 3-3
Starting the engine .................................. 5-1
Start switch.............................................. 3-5
Steering, checking................................. 6-25
Storage.................................................... 7-3
Storage compartment............................ 3-11
Supporting the motorcycle .................... 6-30TTachometer ............................................. 3-3
Throttle cable free play, checking ......... 6-12
Throttle grip and cable, checking and
lubricating ........................................... 6-22
Tires ...................................................... 6-13
Tool kit..................................................... 6-1
Troubleshooting .................................... 6-33
Troubleshooting chart ........................... 6-34
Turn signal indicator lights ...................... 3-2
Turn signal light bulb or tail/brake light
bulb, replacing .................................... 6-29
Turn signal switch ................................... 3-5VValve clearance..................................... 6-13
Vehicle identification number .................. 9-1
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