Honda Crf 250 M Manual

							FRAME Remarks
Shock spring 
Standard
Stiffer Optional
Softer
Stiffer
Fork spring 
    Standard 
Optional
Softer
The standard fork spring and shock spring 
mounted on the motorcycle when it leaves the 
factory are not marked. Before replacing the 
springs, be sure to mark them so they can be 
distinguished from other optional springs.
296.8 lbf/in (5.30 kgf/mm)
No mark
(factory products)
Red
paint
(aftermarket parts) or
285.6 lbf/in (5.10 kgf/mm)
25.20 lbf/in (0.45 kgf/mm)
24.08 lbf/in (0.43 kgf/mm)
26.32 lbf/in (0.47 kgf/mm)
Jet needle number
(1/2 clip position 
leaner than 
standard series. 
leaner only at 1/8 
to 3/4 throttle) 
NCVN
   Ø2.725 mm
NCVP
   Ø2.735 mm
NCVQ
   Ø2.745 mm
NCVR
   Ø2.755 mm NCYN
   Ø2.725 mm
NCYP
   Ø2.735 mm
(standard needle)
NCYQ
   Ø2.745 mm
NCYR
   Ø2.755 mm
NCYS
   Ø2.765 mmNCVS
   Ø2.765 mm CARBURETOR Remarks
Main jet 
(Standard: #172)
Slow jet
(Standard: #42) #162 – #182 (in increments of 
2 or 3) 
                        
#38 – #48
(in increments of 2 or 3) 
Jet Needles 
Standard needle: NCYQ 
Straight diameter: Ø2.745 mm
                                                     
     
Jet needle number 
(standard series) 
TOOLS Remarks
FRAME Remarks
Driven sprocket 
Standard< >: Drive chain links 
51 Teeth, Aluminum.
 
20 inch 
    • wheel assembly 
      (except brake disk) 
    • tire tube 
    • tire flap
    • rim lock (bead stopper)
    • front tire
      (90/100-20, 90/100-20 M/C)
Fork height: 0 in (0 mm) 
(align the top of the fork tube
 with the top of the upper clamp)  Optional
Optional
Optional50 Teeth, Aluminum 
 
52 Teeth, Aluminum 
 
Handlebar 
lower holder 
Standard 3 mm offset
no offset
Front wheel 
      Standard  21 inch 
Fork height: 0.3 in (7.0 mm) 
(align the index groove with the
 top of the upper clamp) 
Pin spanner A 
WorkstandTo adjust spring preload. 
(two spanners required) 
For maintenance
General flow characteristics
Leaner                Richer
 
(at 1/16 to 1/4 throttle)
172
Blue
78.700 mm78.250 mm59.41 mm58.96 mm
White
308 lbf/in (5.50 kgf/mm)
319.2 lbf/in (5.70 kgf/mm)
Red
Pink
These parts and tools may be ordered from your 
authorized Honda dealer. 
1 scribe mark
(aftermarket parts)
3 scribe mark
1 scribe mark and
3 scribe mark 75
degrees apark
Size
Jetneedle number
Straight diameter (2.745 mm)
Technical Information147
Optional Parts List 
						

							148Technical Information
Spare Parts & Equipment
There are numerous spare parts you can take to
an event to help ensure you get in a full day of
riding.  In addition to the usual nuts and bolts,
consider the following:
Spare Parts
spark plugs
air cleaner (clean & oiled, sealed in a plastic bag)
optional carburetor jets/needles
chain & masterlinks
chain guide slider
chain guide
chain rollers
inner tubes (front & rear)
fenders
footpegs
front & side number plates
handlebar
grips
levers (brake, clutch & hot start)
clutch lever handlebar mount
clutch cable
hot start cable
throttle assembly
throttle cable
shift lever
brake pedal
spokes (front & rear, each side)
sprockets (larger & smaller than standard, for
gearing changes & collision damage
replacement) 
assorted nuts, bolts, washers, screws, cotter pins
Additional Spares
front brake assembly
rear brake assembly
wheels & tires (front & rear, mounted)
clutch disc and plates 
engine & transmission oil 
seatignition components
top end-complete
radiator hoses
radiator shrouds (L & R)
brake hoses (front & rear)
General Tools
sockets (3/8 in drive)
screwdrivers: blade & Phillips No. 1, 2, 3
wrench, large adjustable
wrenches: open end & box
wrenches: hex (Allen)
wrench, spoke
torque wrench (metric scale, click-stop style)
pliers: standard, needle-nose, channel-lock set
hammer, plastic head
syringe with adjustable stop
tire pressure gauge
tire irons
tire pump or air tank
feeler gauge set
vernier caliper (metric)
pressure/vacuum testing equipment (USA only)
Honda Special Tools
Any special tools for your motorcycle purchased
from your Honda dealer.
• Lock Nut Wrench 07WMA-KZ30100
• Nipple Wrench 07JMA-MR60100
• Nipple Wrench 070MA-KZ30100
Chemical Products
Pro Honda GN4, HP4 (without molybdenum
additives) or HP4M (with molybdenum
additives) 4-stroke Oil
(Engine Oil)Pro Honda HP Trans Oil or Pro Honda GN4 or
HP4  (without molybdenum additives only) 
4-stroke Oil (Transmission Oil)
Honda thread Lock
Pro Honda HP Fork Oil 5W
Honda Brake Fluid 
Pro Honda Chain Lube 
Pro Honda Foam Filter Oil
Honda brite cleaner 
Honda Contact Cleaner
Honda Dielectric Compound 
Honda Hand Grip Cement 
Honda Hondalock 
Honda Moly 60 Paste (U.S.A. only) or
molybdenum disulfide paste (containing more
than 40% molybdenum disulfide additive) 
White Lithium Grease 
Wheel Bearing Grease 
Silicone Sealer
high-temperature grease
antifreeze
Other Products
pliers-safety wire
safety wire
mechanic’s wire
duct tape
plastic tie-wraps
hose clamps
drop light
electrical tape 
						

							Technical Information149
Wiring Diagram
THROTTLE POSITION
SENSOR SPARK
PLUG 
						

							150Technical Information 
						

							Consumer Information151
Consumer Information
This section contains information about
contacting Honda and how to get an official
Honda service manual.Authorized Manuals .........................................152
Contacting Honda.............................................153
Your Honda Dealer...........................................154
The Honda Rider’s Club (USA only) ..............155 
						

							The Service Manual used by your authorized Honda dealer is available from
Helm, Inc.
Also available, but not necessary to service your model is the Honda Common
Service Manual which explains theory of operation and basic service
information for various systems common to all Honda motorcycles, motor
scooters and ATVs.
These Honda manuals are written for the professional technician, but most
mechanically-capable owners should find them helpful if they have the proper
tools and skills.  Special Honda tools are necessary for some procedures.
Order On-Line: www.helminc.com
Order Toll Free: 1-888-CYCLE93 (1-888-292-5393)
(NOTE: For Credit Card Orders Only)
Monday - Friday 8:00 AM - 6:00 PM EST
OR
By completing this form you can order the materials desired.  You can pay by
check or money order, or charge to your credit card.  Mail to Helm,
Incorporated, at the address shown on this order form.
Canada: See your Honda dealer to order authorized manuals.
152
Consumer Information
Authorized Manuals
Publication Item No. Description Price Each*
61KRN01 2005 CRF250R Service Manual $48.00
61CM002 Common Manual $48.00
31KRN610 2005 CRF250R Owner’s  Manual $16.00
*Prices are subject to change without notice and without incurring obligation.
S
H
I
P
T
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NOTE: Dealers and Companies, please provide dealer or company name, and also
the name of the person to whose attention the shipment should be sent.  For
purchases outside U.S.A., please write to the address shown below for a quotation.
Customer Name
Attention
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City                                                                         State          Zip Code
Daytime Telephone Number (            )
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Item Description Qty.Publication 
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*Prices are subject to change without notice and
without incurring obligation.
  Orders are mailed within 10 days.  Please allow
adequate time for delivery. 
						

							Consumer Information153
Your owner’s manual was written to cover most
of the questions you might ask about your
Honda.  Any questions not answered in the
owner’s manual can be answered by your Honda
dealer.  If he doesn’t have the answer right away,
he will get it for you.
If you have a difference of opinion with your
dealer, please remember that each dealership is
independently owned and operated.  That’s why
it’s important to work to resolve any differences
at the dealership level.
If you wish to comment on your experiences with
your Honda or with your dealer, please send your
comments to the following address (USA only):
Motorcycle Division, American Honda Motor
Co., Inc., P.O. Box 2220, Torrance CA 90509-
2220, mailstop: 100-4W-5B, 
telephone: (310) 532-9811.
Canada: Refer to the warrantly booklet that was
supplied with your vehicle.
Please include the following information in your
letter:
•name, address, and telephone number
•product model, year, and frame/VIN serial
number
•date of purchase
•dealer name and address
We will likely ask your Honda dealer to respond,
or possibly acknowledge your comments directly.
Contacting Honda 
						

							Your Honda Dealer
154Consumer Information
Once you purchase your new Honda, get familiar
with the organization of your Honda dealer so
you can utilize the full range of services
available.
The service department is there to perform
regular maintenance and unexpected repairs.  It
has the latest available service information from
Honda.
The parts department offers Genuine Honda
parts, Pro Honda products, Hondaline accessories
(USA only), and Honda accessories and products
(Canada only).  The same quality that went into
your Honda can be found in Genuine Honda
replacement parts.  You’ll also find comparable
quality in the accessories and products available
from the parts department.Your dealer can inform you about competition
events in your area.  You’ll also find that your
dealer is a source of information (USA only) the
Honda Rider’s Club of America.
We’re sure you’ll be as pleased with the service
your Honda dealer continues to provide after the
sale as you are with the quality and dependability
of your Honda. 
						

							Consumer Information155
The Honda Rider’s Club (USA only)
One of the best ways get the most enjoyment
from owning and riding your Honda is through
the Honda Rider’s Club of America.  Your
purchase of a new motorcycle, scooter, ATV or
PWC from a participating U.S. Honda dealer
entitles you to a complimentary one-year
membership in the club. There are handreds of
HRCA Chapter sponsoring dealers across the
USA with events and activities almost every
weekend. Membership benefits include:
•24-hour, toll-free roadside assistance for your
new Honda (includes roadside assistance for
your transport vehicle as long as your Honda
is aboard or in tow).
•Vehicle transport to the nearest Honda dealer
or service center if necessary.
•An exclusive HRCA website complete with
access to the official Honda Common Service
Manual, contests, insider information and
more.
•Reimbursement (up to $75) for Motorcycle
Safety Foundation training. Separate free
training from the Speialty Vehicle Institute of
America for ATV owners.
•One full year of the Honda Red Rider
magazine or Honda Red Rider ATV(for ATV
purchasers).
•Discounts from HRCA partners for
experienced rider courses.
•Discounted vehicle insurance from the
HRCA’s insurance partner.
•Racing contingency programs and assistance
at selected dual-sport, off-road, and motors
events.
Contact your Honda dealer for more information
or call: 1 800-847-HRCA or log on to 
www. hrca. honda. com. 
						

							Table of Contents
156Table of contents
The following presents the contents of each
section of your owner’s manual.
MOTORCYCLE SAFETY...............................1
Important Safety Information..............................2
Important Safety Precautions..........................2
Accessories & Modifications ..........................3
Safety Labels .......................................................4
OPERATING CONTROLS .............................5
Component Locations .........................................6
BEFORE RIDING ............................................7
Are You Ready to Ride? .....................................8
Is Your Motorcycle Ready to Ride?..... ...............9
Pre-ride Inspection ..........................................9
BASIC OPERATING INSTRUCTIONS ......11
Safe Riding Precautions................................12
Starting & Stopping the Engine ........................13
Preparation ....................................................13
Starting Procedure ........................................13
Flooded Engine .............................................13
How to Stop the Engine................................14
Break-in Guidelines ..........................................15
SERVICING YOUR HONDA........................17
Before You Service Your Honda
The Importance of Maintenance .......................18
Maintenance Safety ...........................................19
Important Safety Precautions........................19
Maintenance Schedule ......................................20
General Competition Maintenance ...................22
Before & After Competition Maintenance........26
Between Motos & Practice Maintenance .....26
After Competition Maintenance ...................26Service Preparations
Component Locations .......................................28
Seat Removal ....................................................29
Fuel Tank Removal ...........................................30
Subframe Removal ............................................32
Service Procedures
Fluids & Filters
Fuel System .......................................................34
Engine Oil .........................................................36
Transmission Oil ...............................................39
Coolant ..............................................................41
Air Cleaner ........................................................43
Crankcase Breather ...........................................45
Engine
Throttle ..............................................................46
Engine Idle Speed .............................................48
Clutch System ...................................................49
Hot Start Lever ..................................................53
Spark Plug .........................................................54
Valve Clearance.................................................55
Piston/Piston Rings/Piston Pin ..........................63
Chassis
Suspension.........................................................71
Front Suspension Inspection .........................71
Rear Suspension Inspection ..........................72
Fork Oil Change ...........................................73
Brakes ................................................................76
Wheels ...............................................................80
Tires & Tubes ....................................................81
Drive Chain .......................................................83
Exhaust Pipe/Muffler ........................................86
Additional Maintenance Procedures .................89
Appearance Care ...............................................91ADJUSTMENTS FOR COMPETITION .....93
Front Suspension Adjustments ..........................94
Rear Suspension Adjustments .........................107
Suspension Adjustments  for Track 
Conditions ...................................................111
Suspension Adjustment  Guidelines .................112
Carburetor Adjustments & Tuning Tips ..........115
Chassis Adjustments........................................127
Gearing ............................................................128
Tire Selection for Track Conditions ................129
Personal Fit Adjustments ................................130
TIPS ................................................................131
Transporting Your Motorcycle ........................132
Storing Your Honda.........................................133
You & the Environment ..................................134
Troubleshooting...............................................135
TECHNICAL INFORMATION ..................137
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
CONSUMER INFORMATION ...................151
Authorized Manuals ........................................152
Contacting Honda............................................153
Your Honda Dealer..........................................154
The Honda Rider’s Club (USA only) .............155