ABS YAMAHA YZ250F 2007 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 49/13 (3.769)
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, CDN,
AUS, NZ, ZAEUROPE
(Except for F)F
Frame type Semi double
cradle← ←
Caster angle 27.0°← 27.1°
Trail 115.6 mm
(4.55 in)116.7 mm
(4.59 in)118.1 mm
(4.65 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 307 mm (12.1 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:
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 = 4.2 N/mm
(0.428 kg/mm, 24.0 lb/in)----
Optional spring Yes ----
Oil capacity 527 cm
3 (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)252 mm
(9.92 in)----
Two I.D. marks 263 mm
(10.35 in)258 mm
(10.16 in)----
Three I.D. marks 254.5 mm
(10.02 in)249.5 mm
(9.82 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 = 48.0 N/mm
(4.90 kg/mm,
274.4 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 19 1.9 12
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 M8 × 1.25 4 34 3.4 25
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 9 0.9 6.5
Fuel cock M6 × 1.0 2 4 0.4 2.9
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 (USA und CDN)
Yamalube 4, SAE10W30 oder SAE20W40
Yamalube 4-R, SAE10W50
API Service, Sorte SG oder höher/JASO MA
(Nicht USA und CDN)
SAE10W30, SAE10W40, SAE15W40,
SAE20W40 oder SAE20W50
API Service, Sorte SG oder höher/JASO MA
Füllmenge:
Motoröl
Ölwechsel ohne Filterwechsel 1,05 L (0,92 Imp qt, 1,11 US qt)
Ölwechsel mit Filterwechsel 1,15 L (1,01 Imp qt, 1,22 US qt)
Gesamtmenge 1,30 L (1,14 Imp qt, 1,37 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 49/13 (3,769)
Ausführung Sequenzielles 5-Gang-Klauengetriebe
Betätigung Fußschalthebel (links)
-20 -10 0 10 20 30 40 50
˚C 0 10 30 50 70 90 110 130
˚F
YAMALUBE 4(10W-30) oder SAE 10W-30
YAMALUBE 4(20W-40) oder SAE 20W-40
YAMALUBE 4-R(10W-50) oder SAE 10W-50
-20 -10 0 10 20 30 40 50
˚C
SAE 10W-30
SAE 10W-40
SAE 15W-40
SAE 20W-40
SAE 20W-50
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, CDN,
AUS, NZ, ZAEUROPE
(Nicht F)F
Rahmenbauart Schleifenrohr-
rahmen mit
geteiltem
Unterzug← ←
Lenkkopfwinkel 27,0°← 27,1°
Nachlauf 115,6 mm
(4,55 in)116,7 mm
(4,59 in)118,1 mm
(4,65 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 307 mm (12,1 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 - 21
SPEC
ÈInsert the end of the fuel tank breather hose into
the hole in the steering stem.
ÉInstall the connector cover so that it does not
come in between the radiator hose 1 and radia-
tor.
ÊAligh the paint mark on the cylinder head
breather hose with the front end of the hose
guide.
ËPass the cylinder head breather hose on the out-
side of the radiator hose 1 and then between the
radiator 4 and frame.ÌPass the clutch cable through the cable guide.
ÍPass the clutch cable in front of the radiator
mounting boss.
ÎPass the fuel hose between the hot starter cable
and throttle position sensor lead.
ÏPass the carburetor breater hoses so that they
are not pinched between the upper engine
bracket and carburetor.
ÐPass the carburetor breather hoses and over-
flow hose so that all there hoses do not contact
the rear shock absorber.
CABLE ROUTING DIAGRAM

2 - 25
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