Honda CRF250R Owner's Manual & Competition Handbook

Servicing Your Honda 71
Piston/Piston Rings/Piston Pin
6. Connect the radiator hose (10) to the cylinder
head and tighten the radiator hose clamp (11)
securely.
(10) radiator hose
(11) radiator hose clamp
7. Install the shims, valve lifters and camshaft
(page 61).
8. Install the spark plug (page 55).
9. Install the crankshaft hole cap (page 63).
10.Install the cylinder head cover (page 63).
11. Install the exhaust pipe (page 90).
12.Install the carburetor (page 126).
13.Install the subframe (page 33).
14.Install the fuel tank and the seat (pages 29, 31).
(10)
(11)
15.Pour a fresh recommended coolant mixture
(page 41).
Check for the following:
– compression leaks
– abnormal engine noise
– secondary air leaks
– coolant leaks
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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)