2021 Honda CRF450X Specifications

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Make ModelHonda CRF450X
Year2021
Full Model Name2021 Honda CRF 450 X
EngineLiquid cooled, 4-stroke, 1 cylinder, SOHC, 4 valves
Displacement449cc
Bore x Stroke96mm x 62.1mm
Compression Ratio12:1
InductionType: EFI; Bore size: Ø 46mm
StartingElectric Start
Max Power33.03KW (44.3hp) @ 7,500RPM
Transmission / Drive6 Speeds / Chain
Front SuspensionØ 49mm forks, 305mm (12″) wheel travel
Rear SuspensionPro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability; 11.8 inches of travel, 300mm (11.8″) wheel travel
Front BrakesType: Disc 1 disc, Ø 260mm, 2 piston calipers
Rear BrakesType: Disc 1 disc, Ø 240mm, 1 piston caliper
Front Wheel80/100-21 80/100-21 51M DUNLOP MX52F
Rear Wheel110/100-18 110/100-18 64M DUNLOP MX52
Seat Height963mm (37.9″)
Fuel Capacity7.6L (2.01gal.)
Top Speed128.75km/h (80mph)
Idle Speed RPM1,800+/-100
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Bike2021 Honda CRF450X
Standard Maintenance Interval965.61km (600mi)
Break-in Interval24.14km (15mi)
Engine Oil Change Interval965.61km (600mi)
Initial Valve Check160.93km (100mi)
Periodic Valve Check965.61km (600mi)
Engine Oil Capacity With Filter Change1.15L (0.304gal.)
More on Engine OilPro Honda GN4 4-stroke oil engine. SAE 10W-30/SAE 10W-40
Idle Speed RPM1,800 +/- 100
Coolant Capacity1.24L (0.328gal.) or 1.14L (0.301gal.) at draining
SparksNGK SILMAR9A-9S (Standard)/NGK SILMAR10A-9S (Racing)
Spark Plug Gap0.8 – 0.9mm
Final DriveType: Chain 520 RK520EXU/116LE Final Drive Ratio: 13 / 51
Front Wheel80/100-21 80/100-21 51M DUNLOP MX52F
Front Wheel Pressure (solo/dual riding)22psi (1.52bar, 151.68kPa)
Rear Wheel110/100-18 110/100-18 64M DUNLOP MX52
Rear Wheel Pressure (solo/dual riding)22psi (1.52bar, 151.68kPa)
Headlight12V-35W
TaillightLED
Throttle Grip Free Play3 (0.12) – 6mm (0.24″)
Clutch Lever Free Play10 (0.39) – 20mm (0.79″)
Drive Chain Slack25 (0.98) – 35mm (1.38″)
Engine Oil Drain Bolt Torque18N·m (13.28ft·lbf)
Engine Oil Filter Torque10N·m (7.38ft·lbf)
Front Axle Pinch Bolt Torque20N·m (14.75ft·lbf)
Front Axle Bolt Torque88N·m (64.91ft·lbf)
Front Brake Disc Bolt Torque16N·m (11.8ft·lbf)
Front Brake Caliper Mounting Bolt Torque30N·m (22.13ft·lbf)
Rear Axle Bolt Torque128N·m (94.41ft·lbf)
Rear Brake Disc Bolt Torque16N·m (11.8ft·lbf)
Drive Sprocket Bolt/Nut Torque31N·m (22.86ft·lbf)
Driven Sprocket Bolt/Nut Torque32N·m (23.6ft·lbf)