Honda Crf 250 M Manual

							Servicing Your Honda27
Before & After Competition Maintenance
Routine Cleaning
If your CRF is only slightly dirty, it is best to
clean it by hand with the aid of a stiff bristled
nylon brush and some clean rags. 
Take care to prevent catching your fingers
between the chain and sprocket.
A variety of reasonably priced cleaning brushes
are available from variety, drug, food, and 
hardware stores.  Some of these brushes are
extremely useful in removing dirt from the many
tight contours of the metal pieces of your CRF.
Avoid using stiff, abrasive brushes on the plastic
or rubber parts.  
If your CRF was exposed to sea air or salt water,
rinse it as soon as possible after the event, dry it,
and apply a spray lubricant to all metal parts.  
If you decide to wash your motorcycle or use
cleaners, refer to 
Appearance Care(page 91).   
						

							28Servicing Your Honda
Component Locations
choke knobair cleaner housing cover
rear suspension
air cleaner
chain slipper
rear wheel
axle
chain
adjuster
drive chainchain slider
transmission oil
drain bolt engine oil drain boltleft side
cover clutch lever
fuel tank
carburetor front brake hose
steering
head
front suspension
fuel valveshift lever
kickstarterthrottle
front brake lever
spark plug
front wheel axle
rear brake pedal
clutch leverhot start lever
front brake lever
engine stop button
fuel fill capradiator capthrottle grip 
						

							Servicing Your Honda29
Seat Removal
Refer to Safety Precautions on page 19.
Removal
1. Remove the seat bolts (1) and collars (2).
2. Slide the seat (3) back.
(1) seat bolts (3) seat
(2) collars
Installation
1. Slide the seat front prong (4) onto the seat
bracket (5) and the seat rear prong (6) onto
the tab (7) by pushing down and forward on
the seat in each of these areas.
2. Install the collars and tighten the seat bolts.
19 lbf·ft (26 N·m, 2.7 kgf·m)
(4) seat front prong
(5) seat bracket
(6) seat rear prong
(7) tab
(3)
(2)(1)
(4)
(5)
(7)(6) 
						

							30Servicing Your Honda
Fuel Tank Removal
Refer to Safety Precautions on page 19.
Removal
1. Turn the fuel valve (1) OFF.5. Pull the breather tube (5) out of steering stem
nut.
6. Unhook and remove the fuel tank band (6).
7. Remove the fuel tank bolt (7).
(5) breather tube
(6) fuel tank band
(7) fuel tank bolt
8. Disconnect the fuel line (8) from the fuel
valve. The fuel line leading to the 
carburetor must be disconnected, not the fuel
line leading to the fuel tank.
9. Remove the fuel valve bolt (9) and fuel valve.
10.Remove the fuel tank.
(8) fuel line (9) fuel valve bolt
WARNING
Gasoline is highly flammable and 
explosive. You can be burned or
seriously injured when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
(4)(2)
(3)
(7)
(5)
(6)
(9)
(8)
(2) shroud A bolts
(3) shroud B bolts/collars
(4) shrouds
(1)
(1) fuel valve
2. Remove the seat (page 29).
3. Remove the shroud A bolts (2).
4. Remove the shroud B bolts/collars (3) and
shrouds (4). 
						

							Servicing Your Honda31
Fuel Tank Removal
(2)
(1)
(3)
(4)
(6)
(5)
(7)
(8)(10)
(9)
Installation
1. Install the fuel tank on the frame.
2. Install the fuel valve (1) and fuel valve bolt
(2).
3. Connect the fuel line (3) to the fuel valve.
(1) fuel valve (2) fuel valve bolt
(3) fuel line
4. Install the fuel tank bolt (4).
5. Hook the air cleaner cover rubber (5).
6. Install the fuel tank band (6).7. Put the breather tube (7) in the steering stem
nut.
(7) breather tube
8. Install the shrouds (8) and shroud B bolts/
collars (9).
9. Install the shroud A bolts (10).
(8) shrouds
(9) shroud B bolts
(10) shrouds A bolts
(4) fuel tank bolt
(5) air cleaner cover rubber
(6) fuel tank band
10. Install the seat (page 29). 
						

							32Servicing Your Honda
(13)
(14)
(12)
Subframe Removal
Refer toSafety Precautions on page 19.
Removal
1. Remove the seat (page 29).
2. Remove the side covers (1) by removing the
bolts/collors (2).
(1) side covers
(2) bolts/collars
3.  Loosen the muffler clamp bolt (3).
4.  Remove the muffler A bolt (4), muffler B
bolt/washer (5) and muffler (6).
(3) muffler clamp bolt
(4) muffler A bolt
(5) muffler B bolt/washer
(6) muffler
5.  Disconnect the crankcase breather tube (7).
6. Unhook the fuel tank band (8), and remove it.
7. Unhook the air cleaner cover rubber (9).
8.  Loosen the screw (10) on the air cleaner
connecting tube clamp (11).
(7) crankcase breather tube
(8) fuel tank band
(9) air cleaner cover rubber
(10) screw
(11) air cleaner connecting tube clamp
9.  Remove the subframe mounting A bolts (12)
and subframe mounting B bolt (13). Then
remove the subframe (14) by pulling it
straight backward.
(12) subframe mounting A bolts
(13) subframe mounting B bolt
(14) subframe
Installation
1.  Loosely attach the upper and lower ends of
the subframe (1) to the mainframe while
connecting the air cleaner connecting tube to
the carburetor. Then align the subframe with
the rear wheel and tighten the subframe
mounting B bolt (2) and subframe mounting A
bolts (3) to the specified torque:
B bolt:
22 lbf·ft (30 N·m, 3.1 kgf·m)
A bolt:36 lbf·ft (49 N·m, 5.0 kgf·m)
(1) subframe
(2) subframe mounting B bolt
(3) subframe mounting A bolts
(1)(2)
(5)
(6)(4)(3)
(8)(9)
(7)
(11)
(10)
(2)
(1)
(3) 
						

							Servicing Your Honda33
Subframe Removal
2. Tighten the screw (4) on the air cleaner
connecting tube clamp (5).
3. Hook the air cleaner cover rubber (6).
4. Install and hook the fuel tank band (7).
5. Connect the crankcase breather tube (8).
(4) screw
(5) air cleaner connecting tube clamp
(6) air cleaner cover rubber
(7) fuel tank band
(8) crankcase breather tube
6. Remove the old gasket from exhaust pipe.
7. Install the muffler clamp (9) by aligning the
tab (10) of the muffler clamp with the cut-out
(11) of the muffler (12). 
(9) muffler clamp (11) cut-out
(10) tab (12) muffler 
8. Install the new gasket (13) as shown.
(13) gasket
9. Install the muffler (12).
(12) muffler
(14) muffler B bolt/washer
(15) muffler A bolt
(16) muffler clamp bolt
12.Install the side covers (17), side cover bolts
and collars (18).
13.Install the seat (page 29).
(17) side cover
(18) side cover bolts/collars
(5)(7)(6)
(8)(4)
(11)(10)(9)
(12)
(13)
(12)(15)(16)
(14)
(17)(18)
10. Tighten the muffler B bolt/washer (14) and
muffler A bolt (15) to the specified torque:
19 lbf·ft (26 N·m, 2.7 kgf·m)
11. Tighten the muffler clamp bolt (16) to the
specified torque:
15 lbf·ft (21 N·m, 2.1 kgf·m) 
						

							34Servicing Your Honda
Fuel System
Refer toSafety Precautionson page 19.
Fuel Recommendation
We recommend that you use unleaded fuel
because it produces fewer engine deposits and
extends the life of exhaust system components.  
Your engine is designed to use any gasoline that
has a pump octane number of 91 or higher.
Gasoline pumps at service stations normally 
display the pump octane number.  For 
information on the use of oxygenated fuels, see
page 144.  
Use of lower octane gasoline can cause persistent
“pinging” or “spark knock” (a louder rapping
noise) which, if severe, can lead to engine 
damage.  (Light pinging experienced while 
operating under a heavy load, such as climbing a
hill, is no cause for concern.)
If pinging or spark knock occurs at a steady
engine speed under normal load, change brands
of gasoline.  If pinging or spark knock persists,
consult your Honda dealer.  
Never use stale or contaminated gasoline. Avoid
getting dirt, dust, or water in the fuel tank.
Type Unleaded
Pump Octane Number 91 (or higher)
Refueling Procedure
Fuel Tank Capacity:1.9 US gal (7.3 liter)
(1) fuel fill cap (3) steering stem nut
(2) breather tube
1. To open the fuel fill cap (1), pull the breather
tube (2) out of the steering stem nut (3).  Turn
the fuel fill cap counterclockwise and remove
it.  
2. Add fuel until the level reaches the bottom of
the filler neck.  Avoid overfilling the tank.
There should be no fuel in the filler neck. 
WARNING
Gasoline is highly flammable and 
explosive.  You can be burned or 
seriously injured when handling fuel.  
•Stop the engine and keep heat, sparks
and flame away.  
•Handle fuel only outdoors.  
•Wipe up spills immediately.
Fuel Valve and Hose
(1) fuel valve  (3) fuel line
(2) fuel filter
1. Check the fuel valve (1) and fuel filter (2) for 
contamination.  
2. Check for leaks.  
3. Check the fuel line (3) for cracks, 
deterioration, damage, or leakage. Replace the
fuel line, if necessary.  
4. Check for interference between the frame and
tank and adjust if necessary.
(2)
(3)
(1)
(3)(1)
(2)
(3) 
						

							Servicing Your Honda35
Fuel System
Fuel Filter
The fuel filter is mounted on the bottom left side
of the fuel tank.  Dirt accumulated in the filter
will restrict the flow of the fuel to the carburetor.
To service the fuel filter:
1. Drain the fuel from the fuel tank into an
approved gasoline container. 
2. Remove the fuel tank (page 30). 
3. Remove the fuel filter (1) from fuel tank by
removing the bolts (2).  Wash the fuel filter in
high flash-point cleaning solvent.
4. Reassemble the fuel filter in the reverse order
of removal.  Make sure the O-ring (3) is in
place.  Install the fuel filter in the fuel tank.  
Refill the fuel tank.  
Attach the fuel valve and fuel line, and turn
the fuel valve to ON; check for leaks. 
(1) fuel filter (3) O-ring
(2) bolts
(3)
(1)
(2) 
						

							36Servicing Your Honda
*   Suggested 4-stroke engine oils are equal
performance to SJ oils that are not labeled as
energy conserving on the circular API service
label.
Engine Oil
Refer to Safety Precautions on page 19.  
Using the proper oil, and regularly checking,
adding, and changing oil will help extend the
service life of the engine’s life. Even the best oil
wears out. Changing oil helps get rid of dirt and
deposits. Operating the engine with old or dirty
oil can damage your engine.  Running the engine
with insufficient oil can cause serious damage to
the engine. Oil Recommendation
API
classificationSG or higher except oils 
labeled as energy conserving 
on the circular API service 
label
suggested oil*
Pro Honda GN4, HP4 
(without molybdenum 
additives) or HP4M (with 
molybdenum additives) 
4-stroke oil, or an equivalent*
viscosity
(weight)SAE 10W–40
JASO T 903 MA or MB
• Your motorcycle does not need oil additives.
Use the recommended oil.
• Do not use API SH or higher 4-stroke engine
oils displaying a circular API “energy 
conserving” service label on the container. They
may affect lubrication.
Other viscosities shown in the following chart
may be used when the average temperature in
your riding area is within the indicated range.
NOT RECOMMENDED OK