Honda CRF250R User Manual

76 Servicing Your Honda
Valve Clearance
1. Check that the spark plug hole packing (1) is in
good condition and replace it if necessary.
Apply engine oil to the spark plug hole packing
and install it to the cylinder head cover (2).
2. Check that the cylinder head cover packing (3)
is in good condition and replace it if necessary.
Install the cylinder head cover packing into the
cylinder head cover groove.
3. Check that the rubber seals (4) are in good
condition, replace them if necessary.
Install the rubber seals onto the cylinder head
cover with the “UP” marks (5) facing up.
4. Install the cylinder head cover (2) and tighten
the cylinder head cover bolts (6) to the
specified torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
5. Connect the spark plug cap (7) and breather
tube (8).
6. Install the fuel tank and seat (pages 34, 36).
Cylinder Head Cover Installation
(1) spark plug hole packing
(2) cylinder head cover
(3) cylinder head cover packing
(1)
(3)
(2)
(4) rubber seals (5) “UP” marks
(2) cylinder head cover
(6) cylinder head cover bolts
(4)
(5)
(5)
(6) (2)
(7) spark plug cap
(8) breather tube
(7)
(8)

Honda CRF250R Specifications

General

Engine Type	Liquid-cooled single-cylinder four-stroke
Displacement	249cc
Bore x Stroke	79.0mm x 50.9mm
Compression Ratio	13.9:1
Starter	Electric
Transmission	Close-ratio 5-speed
Final Drive	Chain
Front Brake	Single 260mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	100/90-19
Wheelbase	58.3 inches
Seat Height	37.8 inches
Ground Clearance	13.1 inches
Fuel Capacity	1.7 gallons
Valve Train	Unicam OHC, four-valve
Induction	Programmed Fuel Injection (PGM-FI)
Throttle Bore	44mm
Ignition	Full transistorized ignition
Front Suspension	49mm inverted Showa coil-spring fork with rebound and compression damping adjustability; 12.2 inches travel
Rear Suspension	Pro-Link Showa single shock with adjustable spring preload, rebound and compression damping; 12.4 inches travel
Rake	27.2°
Trail	115mm (4.5 inches)