Honda Crf 250 M Manual

							Technical Information
Technical Information137 This section contains dimensions, capacities, and
other technical data.Vehicle Identification .......................................138
Specifications ...................................................139
Torque Specifications .......................................140
High Altitude  Carburetor Adjustment ..............143
Oxygenated Fuels .............................................144
Competition Logbook ......................................145
Optional Parts List ...........................................147
Spare Parts & Equipment .................................148
Wiring Diagram................................................149 
						

							Vehicle Identification
138Technical Information
Serial Numbers
The frame, VIN, and engine serial numbers are
required when you register your motorcycle.
They may also be required when ordering
replacement parts.  You may record these
numbers in the Quick Reference section at the
rear of the manual.
The VIN (vehicle identification number) (1)
appears on the Safety Certification Label
attached to the left side of the frame.
LEFT SIDE
(1) vehicle identification number
The frame number (2) is stamped on the right
side of the steering head.
RIGHT SIDE
(2) frame number
The engine number (3) is stamped on the left
crankcase.
LEFT SIDE
(3) engine number
(1)
(2)
(3) 
						

							Specifications
Technical Information139
Overall length 
Overall width 
Overall height 
Wheelbase 
Seat height 
Footpeg height 
Ground clearance 
Dry weight Item English
85.5 in
32.6 in
50.3 in
58.2 in
38.0 in
17.6 in
14.2 in
204 IbsMetric
Type  Dimension 
Frame 
Fork oil capacity 
(except fork damper
per leg)  F. suspension
R. suspension 
F. tire size, pressure 
psi (kPa, kgf/cm
2) 
R. tire size, pressure 
psi (kPa, kgf/cm
2) 
F. brake, swept area 
R. brake, swept area 
Fuel capacity 
Caster angle
Trail lengthTwin tube
Telescopic fork, 
travel 11.0 in (279 mm) 
stroke 12.4 in (315 mm) 
Pro-link, 
travel 12.3 in (313 mm) 
80/100 – 21  51M 
15 (100, 1.0) 
100/90 – 19  57M 
15 (100, 1.0) 
Single disc brake 
51.8 in
2 (334.5 cm2) 
Single disc brake 
60.6 in
2 (391.1 cm2)
27.50˚ 1.9 US gal
4.8 in
14.1 US oz
416 cm
3
123 mm7.3 liter
Item English
3.07 x 2.06 in
0.31 in Cylinder arrangement 
Bore and stroke  
Displacement
Compression ratio 
Engine oil capacity
    After draining
    After draining and
    oil filter change
    After disassembly
    After disassembly Transmission oil
capacity
    After draining
Type 
Identification number 
Main jet (standard) 
Jet needle (standard) Piston valve 
FCR01B
# 172
NCYQ
Needle clip position 
(standard) 
Slow jet (standard) 
Pilot screw opening
Float levelLiquid cooled, 4-stroke
Single 10˚ inclined from 
vertical
0.70 US qt
0.73 US qt
0.90 US qt
0.63 Imp qt
0.74 US qt
3rd groove
# 42
1–3/4 turns out
TypeMetric
660 cm
3
690 cm3
850 cm3
600 cm3
700 cm3
78.0 x 52.2
mm
8.0mm Engine 
Carburetor12.9 : 1
Clutch type
Transmission 
Primary reduction 
Gear ratio I 
Gear ratio II 
Gear ratio III 
Gear ratio IV 
Gear ratio V 
Final reduction Item English Metric
Drive train 
Electrical  Wet, multi-plate type
5-speed, constant mesh
3.166 
2.142
1.750
1.450
1.227
1.041
3.923 
Gear shift pattern
Ignition 
Starting system 
Spark plug :  
    Standard
For extended high
speed ridingICM
Kickstarter  Left foot-operated return 
system 1-N-2-3-4-5 
NGK R0409 B-8
NGK R0409 B-9 2,172 mm
827 mm
1,277 mm
1,479 mm
965 mm
446 mm
361 mm
92.7 kg15.2 cu-in249.4 cm
3 
						

							Torque Specifications
140Technical Information
Nuts, Bolts, Fasteners
Check and tighten nuts, bolts, and fasteners before every outing.
Engine
Item 
1
2
3
4
5
6
7
8
9
10ENGINE
Cylinder head cover
Exhaust pipe joint nut
Water pump cover
Crankshaft hole cap
Transmission oil check 
bolt
Clutch cover
Cylinder bolt
Oil filter cover
Cylinder head bolt
Drive sprocket
Torque
Remarks
lbf
•ft N
•m kgf
•m
7
15
7
11
7
7
7
9
7
2310
21
10
15
10
10
10
12
10
311.0
2.1
1.0
1.5
1.0
1.0
1.0
1.2
1.0
3.2
(8)
(9)
(7)
(10)
(1)
(2)
(3)
(5)
(4)(6)
RIGHT SIDE
LEFT SIDE 
						

							Torque Specifications
Technical Information141 Frame
Item 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20FRAME
Steering stem nut
Fork bridge upper pinch
bolts
Fork bridge lower pinch
bolts
Handlebar upper
holder bolts
Handlebar holder nuts
Front axle nut
Front axle pinch bolts
Rear axle nut
Chain adjuster lock nuts
Engine mounting bolts
Front engine hanger
bracket bolts
Mid engine hanger
bracket bolt
Upper engine hanger
plate bolts
           (engine side)
           (frame side)
Shock absorber (upper) 
                        (lower) 
Swingarm pivot nut
Fork          (fork damper)
                 (fork cap)
Rear shock arm nuts
(swingarm side)
(shock link side)
Rear shock link nuts
(Frame side)
Shock spring lock nut
Kickstarter arm bolt
Torque
Remarks
lbf
•ft N
•m kgf
•m
80
16
15
16
33
65
15
94
20
47
47
47
40
25
33
33
65
25
22
38
38
39
33
28108
22
20
22
44
88
20
128
27
64
64
64
54
34
44
44
88
34
30
52
52
53
44
3811.0
2.2
2.0
2.2
4.5
9.0
2.0
13.0
2.8
6.5
6.5
6.5
5.5
3.0
4.5
4.5
9.0
3.5
3.1
5.3
5.3
5.4
4.5
3.9NOTE 1
NOTE 2
NOTE 1
NOTE 1
NOTE 1
NOTE 1, 3
NOTE 1, 3
NOTE 1, 3
1.  U-nut. 
2.  UBS nut. 
3.  Apply oil to the threads and flange surface. 
4.  Alock bolt.  NOTES:
(19)
(9)
(20)
11
(4)(2)
(1)
(3)
(11)
(6)
(10)(15)(14)
(13)(14)
(16)
(5)
(7)
(12)
(18)(17)
(8) 
						

							Torque Specifications
142Technical Information
Item 
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41FRAME
Front brake master
cylinder holder bolts
Brake hose bolts
Caliper mounting bolts
Front brake disc nuts
Rear brake disc nuts
Brake pedal pivot bolt
Front spoke
Rear spoke
Rim locks
Subframe bolts  (upper)
                        (Iower)
Fork center bolt
Fork center lock nut
Disc cover bolts
Fork protector bolts
Muffler mounting
bolts                     (front)
                             (rear)
Muffler clamp bolt
Sprocket nuts
Seat mounting bolts
Front brake reservoir
cap screws
Rear brake reservoir
cap bolts
Fork air pressure release
screw 
Torque
Remarks
lbf
•ft N
•m kgf
•m
7
25
22
12
12
23
2.8
2.8
9.6
22
36
51
16
 9
5.1
19
19
15
24
19
0.7
0.7
0.99.9
34
30
16
16
31
3.68
3.7
13
30
49
69
22
13
7
26
26
21
32
26
1.0
1.0
1.21.0
3.5
3.1
1.6
1.6
3.2
0.38
0.38
1.3
3.1
5.0
7.0
2.2
1.3
0.7
2.7
2.7
2.1
3.3
2.7
0.1
0.1
0.12NOTE 4
NOTE 1
NOTE 1
NOTE 4
NOTE 1
1.  U-nut. 
2.  UBS nut. 
3.  Apply oil to the threads and flange surface. 
4.  Alock bolt.  NOTES:
Frame
(35)
(28)
(27)
(29)
(36)
(22)
(32)
(24)
(21)(38)
(22)
(40)
(33)
(30) (31)
(26)(22)(39)
(27)(28)
(25)
(22)
(37)(34)
(23) 
						

							Technical Information143
High Altitude  Carburetor Adjustment
NOTICE
When operating this motorcycle at high altitude,
the air-fuel mixture becomes overly rich.
Above 6,500 feet (2,000 m), driveability and
performance may be reduced and fuel
consumption increased.  The carburetor can be
modified to compensate for this high altitude
richness.
However, the carburetor must be returned to
standard factory specifications when lower
altitude riding is desired.  See your Honda dealer
for high altitude modification.
Sustained operation at altitudes below 5,000 feet
(1,500 m) with high altitude carburetor
modifications may cause engine overheating and
damage. 
						

							144Technical Information
Oxygenated Fuels
Some conventional gasolines are being blended
with alcohol or an ether compound.  These
gasolines are collectively referred to as
oxygenated fuels.  To meet clean air standards,
some areas of the United States and Canada use
oxygenated fuels to help reduce emissions.
If you use an oxygenated fuel, be sure it is
unleaded and meets the minimum octane rating
requirement.
Before using an oxygenated fuel, try to confirm
the fuel’s contents.  Some states/provinces
require this information to be posted on the
pump.
The following are the EPA-approved percentages
of oxygenates:
ETHANOL (ethyl or grain alcohol) 10% by
Volume
You may use gasoline containing up to 10%
ethanol by volume.  Gasoline containing ethanol
may be marketed under the name “Gasohol”.
MTBE (Methyl Tertiary Butyl Ether) 15% by
Volume
You may use gasoline containing up to 15%
MTBE by volume.
METHANOL (methyl or wood alcohol) 5% by
Volume
You may use gasoline containing methanol
containing up to 15% methanol by volume as
long as it contains cosolvents and corrosion
inhibitors to protect the fuel system.  Gasoline
containing more than 5% methanol by volume
may cause starting and/or performance problems.
It may also damage metal, rubber, and plastic
parts of your fuel system.If you notice any undesirable operating
symptoms, try another service station or switch
to another brand of gasoline.
Fuel system damage or performance problems
resulting from the use of an oxygenated fuel
containing more than the percentages of
oxygenates mentioned above are not covered
under warranty.
Oxygenated the fuels can damage paint and
plastic.  Be careful not to spill fuel when filling
the fuel tank.  Wipe up any spills immediately.
Oxygenated fuels can damage paint and plastic.
NOTICE 
						

							Consumer Information145
Competition Logbook
Any serious competition effort relies heavily on
the knowledge gained and compiled from
previous racing events.  The best way to organize
the many bits of information is to record them in
a logbook.
Your logbook can include such information as
suspension adjustments, carburetor adjustments,
gearing, and tire selection.  This detailed
information, along with your comments, can
prove valuable when you compete at the same
track or on similar terrain.
Your logbook can also tell you when
maintenance was performed and when it will be
necessary again.  Your logbook also lets you
record any repairs and lets you keep track of the
running time on the engine and suspension
components.
If you choose to sell your CRF, the accurate
maintenance records in your logbook might be
the deciding deal-maker for a potential buyer.
Consider using different color pens or pencils to
record important information on specific
subjects.  For example, record results in black,
jetting changes in red, suspension/chassis settings
in blue, and gearing selections in green.  Color
codes will help you identify the information you
want with a glance.Tuning & Adjustment Records
Keep track of the settings and adjustments that
worked best at a particular location.  These items
include:
• basic track conditions, altitude, and
temperature
• carburetion changes
• suspension settings
• chassis adjustments tested and selected
• gearing
• tire selection
• air pressure
Competition Records
• your placings
• thoughts to improve performance next time:
both yours and your motorcycle’s
• strategy notes
Maintenance Records
• regular interval maintenance
• repairs
• running time on engine
• running time on suspension components
Timekeeping
This Manual lists maintenance intervals for
every-so-many races or every-so-many hours of
running.
Because all races are not the same, the most
effective way to schedule maintenance is by the
hours you have run your CRF.
An official “guestimate” is close enough for our
timekeeping purposes.  You may choose to record
your time the same way aircraft operators do (but
without the benefit of an electrical hourmeter).
All running time is broken down into hours and
tenths of an hour (each six minutes represents
one tenth of an hour).Racing Records
Information worth recording for this section of
your logbook may include:
• Your placing in each moto and overall
finishing position.
• Thoughts on what you could do to improve
your performance next time.
• Notes on any patterns noted in choice of
starting gate positions or in riding portions of
the course as the day progressed that may
prove helpful in future events.
• Any places on the course where you chose the
wrong line and were passed too easily.
• Notes on strategy used by your competition or
by riders in another event that are worth
remembering.
Maintenance Records
Regular maintenance items you’ll want to record
in your logbook should include:
• Dates and results of cylinder, piston and ring
examinations
• Patterns for frequency of need for
decarbonization with a particular oil
• When you last performed shock linkage and
swingarm pivot bearing maintenance
• Engine, transmission, and suspension oil
changes
• chain, sprocket, chain guide and slider
replacements
• coolant changes and related component
replacements
• Spark plug, brake pad and control cable
replacements
In addition, you should record any irregularities
noted in component wear so you’ll remember to
keep a close eye on these areas in the future. 
						

							Date Running  Location/Event Comments (Jetting, Suspension Settings, Gearing, Chassis Adjustments, Maintenance 
Time Performed, etc.)
(Make several photocopies of this page for future use)
146Consumer Information
Competition Logbook