ABS YAMAHA YZ250F 2006 Owner's Manual

SPEC
2 - 3 Transmission:
Primary reduction system Gear
Primary reduction ratio 57/17 (3.353)
Secondary reduction system Chain drive
Secondary reduction ratio 48/13 (3.692) (Except for EUROPE)
49/13 (3.769) (For EUROPE)
Transmission type Constant mesh, 5-speed
Operation Left foot operation
Gear ratio: 1st 30/14 (2.143)
2nd 28/16 (1.750)
3rd 29/20 (1.450)
4th 27/22 (1.227)
5th 25/24 (1.042)
Chassis:
USA, CDNEUROPE
(Except
for F)FAUS, NZ,
ZA
Frame type Semi dou-
ble cradle← ← ←
Caster angle 27.0°27.1°27.3°27.0°
Trail 115.4 mm
(4.54 in)117.7 mm
(4.63 in)119.1 mm
(4.69 in)115.4 mm
(4.54 in)
Tire:
Type With tube
Size (front) 80/100-21 51M (For USA, CDN, ZA, AUS, NZ
and F)
80/100-21 51R (For EUROPE except F)
Size (rear) 100/90-19 57M (For USA, CDN, ZA, AUS, NZ
and F)
100/90-19 NHS (For EUROPE except F)
Tire pressure (front and rear) 100 kPa (1.0 kgf/cm
2, 15 psi)
Brake:
Front brake type Single disc brake
Operation Right hand operation
Rear brake type Single disc brake
Operation Right foot operation
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (link type monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel:
Front wheel travel 300 mm (11.8 in)
Rear wheel travel 310 mm (12.2 in)
Electrical:
Ignition system CDI magneto
GENERAL SPECIFICATIONS

SPEC
2 - 12 CHASSIS
Item Standard Limit
Steering system:
Steering bearing type Taper roller bearing ----
Front suspension: USA, CDN,
AUS, NZ, ZAEUROPE
Front fork travel 300 mm (11.8 in)← ----
Fork spring free length 454 mm (17.9 in)← 449 mm (17.7 in)
Spring rate, STD K = 4.3 N/mm
(0.438 kg/mm,
24.5 lb/in)← ----
Optional spring Yes← ----
Oil capacity 522 cm
3
(18.4 Imp oz,
17.6 US oz) 527 cm3
(18.6 Imp oz,
17.8 US oz) ----
Oil grade Suspension oil
“S1”← ----
Inner tube outer diameter 48 mm (1.89 in)← ----
Front fork top end 5 mm (0.20 in)← ----
Rear suspension: USA, CDN,
AUS, NZ, ZAEUROPE
Shock absorber travel 131.5 mm
(5.18 in)← ----
Spring free length Approx. 265 mm
(10.43 in)← ----
Fitting length One I.D. mark
257 mm
(10.12 in)One I.D. mark
258 mm
(10.16 in)----
Two I.D. marks
263 mm
(10.35 in)Two I.D. marks
264 mm
(10.39 in)----
Three I.D. marks
254.5 mm
(10.02 in)Three I.D. marks
255.5 mm
(10.06 in)----
One I.D. mark
245.5 ~ 263.5 mm
(9.67 ~ 10.37 in)←----
Two I.D. marks
251.5 ~ 269.5 mm
(9.90 ~ 10.61 in)←----
Three I.D. marks
243.0 ~ 261.0 mm
(9.57 ~ 10.28 in)←----
Spring rate, STD K = 50.0 N/mm
(5.10 kg/mm,
285.6 lb/in)←----
Optional spring Yes← ----
Enclosed gas pressure 1,000 kPa
(10 kg/cm
2,
142 psi)← ----
MAINTENANCE SPECIFICATIONS

SPEC
2 - 15
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race.Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Nipple (spoke)—72 3 0.3 2.2
Rear wheel sprocket M8 × 1.25 6 42 4.2 30
Rear brake disc cover M6 × 1.0 2 10 1.0 7.2
Rear brake caliper protector M6 × 1.0 2 7 0.7 5.1
Drive chain puller adjust bolt and locknut M8 × 1.25 2 16 1.6 11
Engine mounting:
Engine and engine bracket (front) M10 × 1.25 1 53 5.3 38
Engine and frame (lower) M10 × 1.25 1 53 5.3 38
Upper engine bracket and frame M10 × 1.25 4 55 5.5 40
Lower engine bracket and frame M8 × 1.25 4 38 3.8 27
Engine and engine bracket (upper) M10 × 1.25 1 55 5.5 40
Lower engine guard M6 × 1.0 3 10 1.0 7.2
Right engine guard M6 × 1.0 1 10 1.0 7.2
CDI unit bracket M6 × 1.0 2 7 0.7 5.1
Cable guide and CDI unit bracket M5 × 0.8 2 4 0.4 2.9
Cable guide and frame M5 × 0.8 1 5 0.5 3.6
Pivot shaft and nut M16 × 1.5 1 85 8.5 61
Relay arm and swingarm M14 × 1.5 1 70 7.0 50
Relay arm and connecting rod M14 × 1.5 1 80 8.0 58
Connecting rod and frame M14 × 1.5 1 80 8.0 58
Rear shock absorber and frame M10 × 1.25 1 56 5.6 40
Rear shock absorber and relay arm M10 × 1.25 1 53 5.3 38
Rear frame (upper) M8 × 1.25 1 32 3.2 23
Rear frame (lower) M8 × 1.25 2 32 3.2 23
Swingarm and brake hose holder M5 × 0.8 4 2 0.2 1.4
Swingarm and patch M4 × 0.7 4 2 0.2 1.4
Upper drive chain tensioner M8 × 1.25 1 16 1.6 11
Lower drive chain tensioner M8 × 1.25 1 16 1.6 11
Drive chain support M6 × 1.0 3 7 0.7 5.1
Seal guard and swingarm M5 × 0.8 4 6 0.6 4.3
Fuel tank mounting boss and frame M10 × 1.25 1 20 2.0 14
Fuel tank M6 × 1.0 2 10 1.0 7.2
Fuel cock M6 × 1.0 2 6 0.6 4.3
Seat set bracket and fuel tank M6 × 1.0 1 7 0.7 5.1
Fuel tank bracket and fuel tank M6 × 1.0 4 7 0.7 5.1
Air scoop and fuel tank M6 × 1.0 6 7 0.7 5.1
Air scoop and radiator guard (lower) M6 × 1.0 2 7 0.7 5.1
Front fender M6 × 1.0 4 7 0.7 5.1
Rear fender (front) M6 × 1.0 2 7 0.7 5.1
Rear fender (rear) M6 × 1.0 2 16 1.6 11
Side cover M6 × 1.0 2 7 0.7 5.1
Seat M8 × 1.25 2 23 2.3 17
Number plate M6 × 1.0 1 7 0.7 5.1
MAINTENANCE SPECIFICATIONS

SPEC
2 - 2 Ölsorte und -viskosität:
Motoröl Nur USA und CDN:
Über 5 °C (40 °F) È
Yamalube 4 (20W-40) oder SAE 20W-40
Motoröl der API-Klasse SG
(ohne reibungsmindernde Additive)
Unter 15 °C (60 °F) É
Yamalube 4 (10W-30) oder SAE 10W-30
Motoröl der API-Klasse SG
(ohne reibungsmindernde Additive)
bzw.
Yamalube 4-R (15W-50)
(ohne reibungsmindernde Additive)
Nicht USA und CDN:
API-Klasse “SG” oder höherwertig
Füllmenge:
Motoröl
Ölwechsel ohne Filterwechsel 1,15 L (1,01 Imp qt, 1,22 US qt)
Ölwechsel mit Filterwechsel 1,25 L (1,10 Imp qt, 1,32 US qt)
Gesamtmenge 1,40 L (1,23 Imp qt, 1,48 US qt)
Kühlsystem-Fassungsvermögen: 0,99 L (0,87 Imp qt, 1,05 US qt)
Luftfilter: Nassfiltereinsatz
Kraftstoff:
Sorte Bleifreies Superbenzin mit einer Mindestoktan-
zahl von 95 (ROZ)
Tankinhalt 7,0 L (1,54 Imp gal, 1,85 US gal)
Vergaser:
Typ FCR-MX37
Hersteller KEIHIN
Zündkerze:
Typ/Hersteller CR8E/NGK (entstört)
Elektrodenabstand 0,7–0,8 mm (0,028–0,031 in)
Kupplungsbauart:
Mehrscheiben-Ölbadkupplung
Getriebe:
Primärantrieb Zahnrad
Primärübersetzung 57/17 (3,353)
Sekundärantrieb Kettentrieb
Sekundärübersetzung 48/13 (3,692) (nicht EUROPE)
49/13 (3,769) (nur EUROPE)
Ausführung Sequenzielles 5-Gang-Klauengetriebe
Betätigung Fußschalthebel (links)
-20
-4-10
140
3010
5020
6830
8640 50
104
122 ˚CTemp.
˚F
10W-30
10W-40
20W-40
20W-50
15W-40
ALLGEMEINE TECHNISCHE DATEN

SPEC
2 - 3 Getriebeabstufung: 1. Gang 30/14 (2,143)
2. Gang 28/16 (1,750)
3. Gang 29/20 (1,450)
4. Gang 27/22 (1,227)
5. Gang 25/24 (1,042)
Fahrwerk:
USA, CDNEUROPE
(Nicht F)FAUS, NZ,
ZA
Rahmenbauart Schleifen-
rohrrah-
men mit
geteiltem
Unterzug← ← ←
Lenkkopfwinkel 27,0°27,1°27,3°27,0°
Nachlauf 115,4 mm
(4,54 in)117,7 mm
(4,63 in)119,1 mm
(4,69 in)115,4 mm
(4,54 in)
Reifen:
Ausführung Schlauch-Reifen
Dimension vorn 80/100-21 51M (nur USA, CDN, ZA, AUS, NZ,
F)
80/100-21 51R (nur EUROPE, nicht F)
Dimension hinten 100/90-19 57M (nur USA, CDN, ZA, AUS, NZ
und F)
100/90-19 NHS (nur EUROPE, nicht F)
Reifenluftdruck (vorn und hinten) 100 kPa (1,0 kgf/cm
2, 15 psi)
Bremsen:
Vorderradbremse Einscheibenbremse
Betätigung Handbremshebel (rechts)
Hinterradbremse Einscheibenbremse
Betätigung Fußbremshebel (rechts)
Radaufhängung:
Vorn Teleskopgabel
Hinten Monocross-Schwinge (mit Umlenkhebelabstüt-
zung)
Federung/Dämpfung:
Vorn Spiralfeder, hydraulisch gedämpft
Federbein Federbein mit gasdruckunterstütztem Stoß-
dämpfer und Spiralfeder
Radfederweg:
Vorn 300 mm (11,8 in)
Hinten 310 mm (12,2 in)
Elektrische Anlage:
Zündsystem Schwunglichtmagnetzünder
ALLGEMEINE TECHNISCHE DATEN

SPEC
2 - 7 Kolbenbolzenaugen-Durchmesser 16,002–16,013 mm
(0,6300–0,6304 in)16,043 mm
(0,6316 in)
Kolbenbolzen-Durchmesser 15,991–16,000 mm
(0,6296–0,6299 in)15,971 mm
(0,6288 in)
Kolbenringe:
1. Kompressionsring (Topring)
Ausführung Abgerundet ----
Abmessungen (B × T) 0,90 × 2,75 mm (0,04 × 0,11 in) ----
Ringstoß (in Einbaulage) 0,15–0,25 mm
(0,006–0,010 in)0,50 mm
(0,020 in)
Ringnutspiel (in Einbaulage) 0,030–0,065 mm
(0,0012–0,0026 in)0,12 mm
(0,005 in)
2. Kompressionsring
Ausführung Konisch ----
Abmessungen (B × T) 0,80 × 2,75 mm (0,03 × 0,11 in) ----
Ringstoß (in Einbaulage) 0,30–0,45 mm
(0,012–0,018 in)0,80 mm
(0,031 in)
Ringnutspiel 0,020–0,055 mm
(0,0008–0,0022 in)0,12 mm
(0,005 in)
Ölabstreifring
Abmessungen (B × T) 1,50 × 2,25 mm (0,06 × 0,09 in) ----
Ringstoß (in Einbaulage) 0,10–0,40 mm
(0,004–0,016 in)----
Kurbelwelle:
Kurbelbreite “A”55,95–56,00 mm
(2,203–2,205 in)----
Max. Schlag “C”0,03 mm (0,0012 in) 0,05 mm
(0,002 in)
Pleuel-Axialspiel “D”0,15–0,45 mm
(0,0059–0,0177 in)0,50 mm
(0,02 in)
Pleuel-Radialspiel “F”0,4–1,0 mm
(0,02–0,04 in)2,0 mm
(0,08 in)
Kupplung:
Reibscheiben-Stärke 2,9–3,1 mm
(0,114–0,122 in)2,7 mm
(0,106 in)
Anzahl 9 ----Bezeichnung Standard Grenzwert
T
B
B
T
B
T
WARTUNGSDATEN

SPEC
2 - 17
ALLGEMEINE ANZUGSMOMENTE
Aus der folgenden Tabelle sind die Anzugsmo-
mente für normale Schraubverbindungen mit
ISO-Normgewinde ersichtlich. Anzugsmo-
mente für spezielle Verschraubungen und
Bauteile werden in jedem Abschnitt dieser
Anleitung gesondert aufgeführt. Um ein Ver-
ziehen der Bauteile zu vermeiden, sollten die
Schraubverbindungen über Kreuz angezogen
werden, bis die vorgeschriebenen Anzugsmo-
mente erreicht sind. Falls nicht anders ange-
geben, gelten die genannten Anzugsmomente
für saubere und trockene Schraubverbindun-
gen bei Raumtemperatur.
A: Schlüsselweite
B: Gewindedurchmesser
MASSEINHEITEN
A
(Mut-
ter)B
(Schrau-
be)ANZUGSMOMENT
Nm mkg ftlb
10 mm
12 mm
14 mm
17 mm
19 mm
22 mm6 mm
8 mm
10 mm
12 mm
14 mm
16 mm6
15
30
55
85
1300,6
1,5
3,0
5,5
8,5
134,3
11
22
40
61
94
Abkürzung Einheit Definition Anwendung
mm
cmMillimeter
Zentimeter10
-3 Meter
10-2 MeterAbstand
Abstand
kg Kilogramm 10
3 Gramm Gewicht
N Newton 1 kg
× m/sec
2Kraft
Nm
m  kgNewtonmeter
MeterkilogrammN
× m
m
× kgAnzugsmoment
Anzugsmoment
Pa Pascal N/m
2Druck
N/mm Newton pro Millimeter N/mm Federrate
L
cm
3 Liter
Kubikzentimeter—
—Volumen
Volumen
U/minUmdrehungen pro
Minute—Motordrehzahl
ALLGEMEINE ANZUGSMOMENTE/
MASSEINHEITEN

2 - 18
SPECCABLE ROUTING DIAGRAM
EC240000
CABLE ROUTING DIAGRAM
1Fuel tank breather hose
2Radiator hose 1
3Cylinder head breather hose
4Radiator hose 4
5Clutch cable
6Throttle position sensor lead
7Fuel hose
8Hot starter cable
9Carburetor breather hose
0Carburetor overflow hose
AConnector coverÈInsert the end of the fuel tank
breather hose into the hole in
the steering stem.
ÉPass the cylinder head
breather hose on the outside of
the radiator hose 1 and on the
inside of the radiator pipe (radi-
ator hose 4).
ÊPass the clutch cable through
the cable guides.
ËPass the clutch cable in front of
the radiator mounting boss.ÌPass the fuel hose between the
hot starter cable and throttle
position sensor lead.
ÍPass the carburetor breather
hoses and overflow hose so
that all there hoses do not con-
tact the rear shock absorber.
ÎInstall the connector cover so
that it does not come in
between the radiator hose 1
and radiator.
B A
99
0
Í
B
A
8
3A2Î
7
Ì
ËÉ
1
È
6
5
4
Ê

2 - 22
SPECCABLE ROUTING DIAGRAM
1Brake master cylinder
2Brake hose holder
3Brake hoseÈInstall the brake hose so that its pipe portion
directs as shown and lightly touches the projection
on the brake caliper.
ÉPass the brake hose into the brake hose holders.
ÊIf the brake hose contacts the spring (rear shock
absorber), correct its twist.
ËInstall the brake hose so that its pipe portion
directs as shown and lightly touches the projection
on the brake master cylinder.
2
31
1A ËÊ
È É
A

3 - 3
INSP
ADJ
MAINTENANCE INTERVALS
FRONT FORK OIL SEAL AND DUST
SEAL
Clean and lube Lithium base grease
PROTECTOR GUIDE
Replace
REAR SHOCK ABSORBER
(After
rain ride)
Inspect and adjust
Lube
Molybdenum disulfide
grease
Replace spring seat Every one year
Retighten
DRIVE CHAIN GUIDE AND ROLLERS
Inspect
SWINGARM
Molybdenum disulfide
grease
Inspect, lube and retighten
RELAY ARM, CONNECTING ROD
Molybdenum disulfide
grease
Inspect, lube and retighten
STEERING HEAD
Inspect free play and retighten
Clean and lube Lithium base grease
Replace bearing
TIRE, WHEELS
Inspect air pressure, wheel run-out,
tire wear and spoke looseness
Retighten sprocket bolt
Inspect bearings
Replace bearings
Lubricate Lithium base grease
THROTTLE, CONTROL CABLE Yamaha cable lube or
SAE 10W-30 motor oil
Inspect dirt and wear on
the throttle cable on the
carburetor side. Check routing and connection
Lubricate
Inspect and clean (throttle cable)
HOT STARTER, CLUTCH LEVER
Inspect free playItemAfter
break-inEvery
race
Every
third
(or
500 km)Every
fifth
(or
1,000 km)As re-
quiredRemarks