Honda CRF450RX 2020 User Manual

Subframe
(cont’d)
Servicing Your Honda 39
Subframe
Refer to Important Safety Precautions on page 23.
Removal
1. Remove the seat (page 34).
2. Remove the right and left shrouds (page 35,
page 37).
3. Remove the right and left mufflers (page 126).
4. Remove the right and left exhaust springs A,
then remove the right and left muffler
mounting A bolts (page 130).
(CRF450RWE only)
5. Remove the seat support base mounting bolts
(1), and collars (2).
6. Disconnect the starter/ignition relay connector
(3), lift the seat support base (4), and hang it to
the left of the subframe (5).
7. Disconnect the breather tube (6) and IAT
sensor connector (7).
8. Loosen the air cleaner connecting tube clamp
screw (8).
9. Disconnect the negative (–) terminal (9) from
the battery (10).
10. Remove the start magnetic switch stay bolt (11)
and plastic wire band (12).
Pull out the start magnetic switch (13).
Remove the start magnetic switch cover (14).
Remove the battery cable terminal bolt (15)
and disconnect the battery cable terminal (16)
from the start magnetic switch.
(1) seat support base mounting bolts
(2) collars
(3) starter/ignition relay connector
(4) seat support base
(5) subframe
(1)
(2)
(4)
(5)
(3)
(6) breather tube
(7) IAT sensor connector
(8) air cleaner connecting tube clamp screw
(9) negative (–) terminal
(10) battery
(8)
(6)
(7)
(9)
(10)
(11) start magnetic switch stay bolt
(12) wire band
(13) start magnetic switch
(14) start magnetic switch cover
(15) battery cable terminal bolt
(16) battery cable terminal
(16)
(15)
(14)
(13)(11)
(12)

Honda CRF450RX 2020 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	13.5:1
Induction	Programmed Fuel Injection (PGM-FI), 46mm throttle body
Ignition	Full transistorized ignition
Transmission	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	120/80-18
Wheelbase	58.3 inches
Seat Height	37.8 inches
Ground Clearance	12.9 inches
Starter	Electric
Trail	4.6 inches
Front Suspension	49mm inverted fork with rebound and compression damping adjustability; 12.0 inches travel
Rear Suspension	12.4 inches of travel
Valve Train	Unicam, four-valve