Honda CRF450RX 2020 User Manual

40 Servicing Your Honda
Subframe
11. Remove the subframe lower bolts (17) and
upper bolts (18).
Remove the subframe (5) while disconnecting
the air cleaner connecting tube (19).
Installation
1. Align the upper and lower ends of the
subframe to the main frame while connecting
the air cleaner box (1) to the air cleaner
connecting tube (2), and loosely install all
subframe bolts.
2. Tighten the subframe upper bolts (3) first and
then tighten the lower bolts (4) to the specified
torque:
subframe upper bolts:
24 lbf·ft (32 N·m, 3.3 kgf·m)
subframe lower bolts:
36 lbf·ft (49 N·m, 5.0 kgf·m)
3. Connect the battery cable terminal (5) to the
start magnetic switch (6).
Install and tighten the battery cable terminal
bolt (7) to the specified torque:
5.2 lbf·ft (7 N·m, 0.7 kgf·m)
Install the start magnetic switch cover (8).
Install the start magnetic switch.
Install and tighten the start magnetic switch
stay bolt (9) to the specified torque:
9 lbf·ft (12 N·m, 1.2 kgf·m)
Install the plastic wire band (10).
(5) subframe
(17) subframe lower bolts
(18) subframe upper bolts
(19) air cleaner connecting tube
(5)
(17)
(17)
(18)
(19)
(18)
(1) air cleaner box
(2) air cleaner connecting tube
(3) subframe upper bolts
(4) subframe lower bolts
(1)
(2)
Left side:
Right side:
(3)
(4)
(4)
(3)
(5) battery cable terminal (8) start magnetic switch
cover
(6) start magnetic switch
(7) battery cable terminal
bolt
(9) start magnetic switch
stay bolt
(10) wire band
(5)
(7)
(8)
(6)(9)
(10)

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