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Honda CRF450X 2006

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Trail / Racing

2006 Honda CRF450X

449cc

4-stroke

255lb

Dry weight

37.9in

Seat height

12.4in

Front travel

5spd

Gearbox

2006 Honda CRF450X overview

Where it ridesRace-ready
  • Street
  • Trail
  • Woods
  • Rocks
  • Desert
  • Track

The 2006 Honda CRF450X is a 449 cc off-road trail bike built for recreational riding and competition. Its liquid-cooled, four-stroke single-cylinder engine uses a carburetor and is paired with a five-speed transmission and electric and kick starting. An aluminum perimeter frame carries a 47 mm inverted Showa cartridge fork and a Pro-Link Showa rear shock, both adjustable for damping. Stock equipment includes a skid plate, headlight, LED taillight, and spark arrester; the radiator has no cooling fan, so prolonged hot idling or slow riding under high load can lead to overheating. Race Team-inspired graphics are the model-year update.

Who it's for

This bike suits experienced off-road riders who want a large-displacement machine for recreational trail riding or competition. The high seat and substantial engine make it a more natural fit for taller, confident riders than for beginners still building control and balance. Its adjustable suspension is useful for competitors tuning the bike to rider weight and riding conditions, while the electric and kick starters offer two ways to start it in the field.

Quick facts

  • The 2006 Honda CRF450X has a 449cc carbureted 4-stroke engine, a 5-speed gearbox and electric and kick start.
  • The 2006 CRF450X weighs 255 lb dry and has a 37.9 in seat height.
  • The 2006 CRF450X runs 80/100-21 front and 110/100-18 rear tires.
  • The 2006 CRF450X takes 0.71 US qt (0.67 L) of 10W-40 engine oil; change it every 600 mi or 6 months (REGULAR OFF-ROAD USE, NON-COMPETITION).
  • The 2006 CRF450X listed at $7,199 (US MSRP). It is not street legal in the US.

2006 Honda CRF450X photos

2006 Honda CRF450X specifications

Engine

Displacement
449cc
Stroke
4-stroke
Fuel system
Carburetor
Bore × stroke
96 × 62.1 mm
Compression
12.0:1
Cooling
Liquid
Configuration
Single-cylinder
Valve train
SOHC
Valves
4
Oil chamber
Dual
Engine oil
0.71 US qt (0.67 L)
Oil type
10W-40
Gearbox oil
0.69 US qt (0.65 L)
Gearbox oil type
SAE 10W-40, JASO T903 MA
Coolant
1.28 US qt (1.21 L)

Clutch

Type
Wet multiplate
Actuation
Cable

Drivetrain

Starting
Electric and kick
Transmission
5-speed
Chain size
520
Chain links
114
Front sprocket
13T
Rear sprocket
51T

Dimensions

Dry weight
255 lb
Seat height
37.9″
Ground clearance
13.6″
Wheelbase
58.4″
Width
32.3″
Height
50.1″
Length
85.8″
Fuel capacity
2.27 gal

Price & warranty

Colors
Red
Warranty
Noise control warranty only

Equipment

Spark arrester
Standard
Headlight
Standard
LED taillight
Standard

Frame & steering

Frame material
Aluminum
Architecture
Perimeter
Rake
27.2°
Trail
4.32″

Suspension

Front
47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability
Front travel
12.4″
Rear
Pro-Link Showa single shock with adjustable spring preload, 17-position rebound damping adjustability, and compression damping adjustment separated into low-speed (13 positions) and high-speed (3.5 turns)
Rear travel
12.3″

Wheels & tires

Front wheel
21″
Rear wheel
18″
Front tire
80/100-21 51M Dunlop D742F
Rear tire
110/100-18 64M Dunlop D756

Brakes

Front disc
240 mm
Rear disc
240 mm

Stock features

Skid plate
Yes
Radiator fan
No
Street legal (US)
No

Battery / electrical

Battery
Yes
Voltage
12V
Capacity
6 Ah

2006 Honda CRF450X maintenance

From the maker's manuals. Tap a row to see the manual page.

Service intervals

Change engine oil (first time)
After 100 mi or 1 month (REGULAR OFF-ROAD USE, NON-COMPETITION)
Change engine oil (first time)
After the first break-in ride (COMPETITION USE)
Change engine oil
Every 600 mi or 6 months (REGULAR OFF-ROAD USE, NON-COMPETITION)
Inspect engine oil
Every 2.5 hours (COMPETITION USE)
Change engine oil
Every 15 hours (COMPETITION USE)
Replace oil filter (first time)
After 100 mi or 1 month (REGULAR OFF-ROAD USE, NON-COMPETITION)
Replace oil filter (first time)
After the first break-in ride (COMPETITION USE)
Replace oil filter
Every 600 mi or 6 months (REGULAR OFF-ROAD USE, NON-COMPETITION)
Replace oil filter
Every 15 hours (COMPETITION USE)
Change gearbox oil (first time)
After 100 mi or 1 month (REGULAR OFF-ROAD USE, NON-COMPETITION)
Change gearbox oil
Every 600 mi or 6 months (REGULAR OFF-ROAD USE, NON-COMPETITION)
Inspect gearbox oil
Every 2.5 hours (COMPETITION USE)
Change gearbox oil
Every 15 hours (COMPETITION USE)
Clean air filter
Every 600 mi or 6 months (REGULAR OFF-ROAD USE, NON-COMPETITION)
Clean air filter
Every 2.5 hours (COMPETITION USE)
Clean air filter
After every heat for dusty riding conditions
Inspect spark plug
Every 600 mi or 6 months (REGULAR OFF-ROAD USE, NON-COMPETITION)
Inspect spark plug
Every 2.5 hours (COMPETITION USE)
Replace piston and rings
Every 15 hours (COMPETITION USE)

Spark plug

Spark plug
NGK IFR8H11
Plug gap
0.039 – 0.043 in (1.0 – 1.1 mm)
Spark plug (alternative)
DENSO VK24PRZ11
Spark plug (optional)
NGK IFR9H11
Spark plug (optional, alternative)
DENSO VK27PRZ11

Torque specs

Oil drain bolt
12 ft‑lb (16 N·m, 1.6 kgf·m)
Oil filter cover bolts
8.9 ft‑lb (12 N·m, 1.2 kgf·m)
Gearbox oil drain plug
16 ft‑lb (22 N·m, 2.2 kgf·m)
Front axle nut
65 ft‑lb (88 N·m, 9.0 kgf·m)
Front axle pinch bolts
15 ft‑lb (20 N·m, 2.0 kgf·m)
Rear axle nut
94 ft‑lb (128 N·m, 13.1 kgf·m)
Upper triple clamp bolts
16 ft‑lb (22 N·m, 2.2 kgf·m)
Lower triple clamp bolts
15 ft‑lb (20 N·m, 2.0 kgf·m)
Steering stem nut
80 ft‑lb (108 N·m, 11.0 kgf·m)
Handlebar clamp bolts
16 ft‑lb (22 N·m, 2.2 kgf·m)
Front brake caliper mounting bolts
22 ft‑lb (30 N·m, 3.1 kgf·m)
Front brake disc nuts
12 ft‑lb (16 N·m, 1.6 kgf·m)
Rear brake disc nuts
12 ft‑lb (16 N·m, 1.6 kgf·m)
Rear sprocket nuts
24 ft‑lb (32 N·m, 3.3 kgf·m)
Front sprocket bolt
23 ft‑lb (31 N·m, 3.2 kgf·m)
Chain adjuster locknut
20 ft‑lb (27 N·m, 2.8 kgf·m)
Shock absorber top mount
32 ft‑lb (44 N·m, 4.5 kgf·m)

Parts that fit the 2006 Honda CRF450X

Exact parts for this bike. Tap one to see every store selling it, cheapest first.

Maintenance

Oil, filters, spark plug, battery, brakes and drive parts you replace as you ride.

Tires

Stock sizes, from the maker's manual.

Controls

Grips, and the throttle part each bike needs to fit them.

Not listed yet: Battery and rear brake pads. We only list a part once its maker names it for this bike, so we don't guess.

Prices include shipping where the store lists it and were checked Nov 2, 2026. A store that doesn't list its shipping is placed as if it charged what the other stores do. Prices change, so confirm at the store before you buy.

2006 Honda CRF450X vs 2005

New for 2006: Race Team-inspired graphics. Of the specs below, the 2006 Honda CRF450X has a $200 higher MSRP and is 5 lb heavier, compared with the 2005 model.

Spec20052006Changed
MSRP$6,999$7,199Changed
Displacement449ccSame
Dry weight250 lb255 lbChanged
Seat height37.9 inSame
Front travel12.4 inSame
Rear travel12.3 inSame
Fuel2.27 galSame
Gearbox5-speedSame
Front tire80/100-21Same
Rear tire110/100-18Same

Honda CRF450X FAQ

  1. What type of engine does the 2006 Honda CRF450X have?

    It has a liquid-cooled, four-stroke, SOHC single-cylinder engine with four valves and carbureted fuel delivery.

  2. What is the seat height of the 2006 Honda CRF450X?

    The seat height is 37.9 in.

  3. How much does the 2006 Honda CRF450X weigh?

    Its dry weight is 255 lb.

  4. How much suspension travel does the 2006 Honda CRF450X have?

    Front travel is 12.4 in, and rear travel is 12.3 in.

  5. How much fuel does the 2006 Honda CRF450X hold?

    The fuel capacity is 2.27 gal.

  6. What engine oil does the 2006 Honda CRF450X use?

    It uses 10W-40 engine oil, with a capacity of 0.71 US qt (0.67 L).

  7. Is the 2006 Honda CRF450X street legal?

    It is not street legal in the US.

  8. What was the MSRP of the 2006 Honda CRF450X?

    The MSRP was $7,199.

  9. What size tires does the 2006 Honda CRF450X use?

    80/100-21 front and 110/100-18 rear.

  10. What spark plug does the 2006 Honda CRF450X take?

    NGK IFR8H11 (or DENSO VK24PRZ11), gapped 0.039 – 0.043 in (1.0 – 1.1 mm).

  11. What chain and sprockets does the 2006 Honda CRF450X use?

    A 520 chain with 114 links on a 13-tooth front and 51-tooth rear sprocket.

  12. Is the 2006 Honda CRF450X different from the 2005 model?

    Yes. New for 2006: Race Team-inspired graphics. Among the main specs, the 2006 Honda CRF450X has a $200 higher MSRP and is 5 lb heavier, compared with the 2005 model.

Other Honda CRF450X model years

Specs from Honda's owner's manual and Honda's website. Updated .