Honda CRF250R 2020 User Manual

Servicing Your Honda 81
Piston/Piston Rings/Piston Pin
1. Remove the cylinder bolt (1) and sealing
washer (2).
2. Remove the cylinder (3) while holding the
piston (4)
NOTICE
Do not let the cam chain fall into the crankcase.
Do not pry on or strike the cylinder.
3. Remove the dowel pins (5) and cylinder gasket
(6).
NOTICE
Do not let the cam chain and dowel pins fall into
the crankcase.
Cylinder Removal
(1) cylinder bolt (2) sealing washer
(2)
(1)
(3) cylinder (4) piston
(4)
(3)
(5) dowel pins (6) cylinder gasket
(6)
(5)

Honda CRF250R 2020 Specifications

General

Engine Type	249cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	79.0mm x 50.9mm
Compression Ratio	13.9:1
Ignition	Full transistorized ignition
Front Brake	Single 260mm disc with twin-piston caliper
Front Tire	80/100-21
Rear Tire	100/90-19
Trail	4.6 inches
Wheelbase	58.3 inches
Seat Height	37.8 inches
Fuel Capacity	1.6 gallons
Ground Clearance	13.2 inches
Valve Train	Unicam, 4-valve
Induction	Programmed Fuel Injection (PGM-FI)
Transmission	5-speed
Final Drive	#520 chain
Front Suspension	49mm inverted Showa coil-spring fork with rebound and compression damping adjustability; 12.2 inches travel
Rear Suspension	Showa® Pro-Link® system with rebound and compression damping adjustability; 12.4 inches travel
Rear Brake	Single 240mm disc
Rake	27.2°