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Honda CRF450X 2005

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Racing / Trail

2005 Honda CRF450X

449cc

4-stroke

250lb

Dry weight

37.9in

Seat height

12.4in

Front travel

5spd

Gearbox

2005 Honda CRF450X overview

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

The 2005 Honda CRF450X is an off-road enduro bike and the first CRF450X, built as an off-road counterpart to the CRF450R motocrosser. Its liquid-cooled, carbureted 449 cc Unicam four-stroke single has a SOHC four-valve layout, electric and kick start, and a wide-ratio five-speed transmission. An aluminum perimeter frame, 47 mm inverted Showa fork with 12.4 in of travel, and Pro-Link Showa rear suspension with 12.3 in of travel support trail and racing use. The 18-inch rear wheel is paired with a 21-inch front wheel; seat height is 37.9 in and dry weight is 250 lb. Standard equipment includes a headlight, spark arrester, and skid plate; the LED taillight is part of the model’s first-year equipment. No radiator fan is fitted, so prolonged hot idling or high engine load at low vehicle speed can cause overheating.

Who it's for

This CRF450X suits an experienced trail or enduro rider who wants a 449 cc four-stroke for off-road riding and racing. Its 37.9 in seat height and 250 lb dry weight call for a rider comfortable managing a tall, substantial dirt bike, while electric and kick start provide two starting options. It is built for one rider, no passenger. It is not a fit for riders who need a street-legal motorcycle.

Quick facts

  • The 2005 Honda CRF450X has a 449cc carbureted 4-stroke engine, a 5-speed gearbox and electric and kick start.
  • The 2005 CRF450X weighs 250 lb dry and has a 37.9 in seat height.
  • The 2005 CRF450X runs 80/100-21 front and 110/100-18 rear tires.
  • The 2005 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 2005 CRF450X listed at $6,999 (US MSRP). It is not street legal in the US.

2005 Honda CRF450X photos

2005 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
Assist
None (standard clutch)

Drivetrain

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

Dimensions

Dry weight
250 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
Front travel
12.4″
Rear
Pro-Link Showa single shock
Rear travel
12.3″

Wheels & tires

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

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
Chemistry
Lead acid
Voltage
12V
Capacity
6 Ah

2005 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 2005 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.

Honda CRF450X FAQ

  1. What engine does the 2005 Honda CRF450X have?

    It has a liquid-cooled, carbureted 449 cc four-stroke single with SOHC and four valves.

  2. What engine oil does the 2005 Honda CRF450X use?

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

  3. What is the seat height of the 2005 Honda CRF450X?

    The seat height is 37.9 in.

  4. How much does the 2005 Honda CRF450X weigh?

    Its dry weight is 250 lb.

  5. What is the suspension travel on the 2005 Honda CRF450X?

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

  6. How much fuel does the 2005 Honda CRF450X hold?

    Fuel capacity is 2.27 gal.

  7. Is the 2005 Honda CRF450X street legal in the US?

    It is not street legal in the US.

  8. What was the MSRP of the 2005 Honda CRF450X?

    The MSRP was $6,999.

  9. What size tires does the 2005 Honda CRF450X use?

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

  10. What spark plug does the 2005 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 2005 Honda CRF450X use?

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

Other Honda CRF450X model years

Specs from Honda's owner's manual, Honda's website and published spec sheets. Updated .