Enduro

Honda CRF450RX 2026

Enduro, 450cc 4T

Partly verified

Illustration: a Honda motocross bike, not this exact model.

From the owner’s manual: engine oil capacity 1.00 L, p. 73; coolant 1.08 L, p. 73; front tire 90/90-21 54M, p. 72; rear tire 120/90-18 65M, p. 72. Checked 26 Sep 2026.

Safety recall 26-458

Safety recall, 2026-04-30

CPSC recall 26-458

Announced by American Honda for Model Year 2025-2026 CRF250R/RX/RWE and CRF450R/RX/RWE Off-Road Motorcycles. It names the 2026 CRF450RX.

Hazard: The handlebar's clamp can unexpectedly cause the handlebar to rotate, posing a risk of serious injury or death due to a crash hazard.
Remedy: Consumers should stop using the recalled off-road motorcycles immediately and contact an authorized Honda Powersports dealer to schedule an appointment for a free inspection and if necessary, a replacement of the handlebar's clamp at the dealer's location.
Units: About 12,600 (In addition, about six were sold in Canada)

A recall can cover only part of a model year, by VIN range. Check the notice, or give a dealer your VIN.

Read CPSC notice 26-458 All dirt bike recalls

Spec card PDF

Gearing

4 of 5 filled

Stock front sprocket: 13T; Research level: Spec sheet (research) · checked 2026-09-25 source [1]
Stock rear sprocket: 50T; Research level: Spec sheet (research) · checked 2026-09-25 source [1]
Chain pitch: 520; Research level: Spec sheet (research) · checked 2026-09-25 source [1]
Stock chain links: Not yet verified
Stock final drive ratio: 3.846 : 1; Verified, read off the manual page: Manual p. 73 · checked 2026-09-26 source [2]

Wheels and tires

2 of 4 filled

Front rim: Not yet verified
Rear rim: Not yet verified
Front tire: 90/90-21 54M; Verified, read off the manual page: Manual p. 72 · checked 2026-09-26 source [2]
Rear tire: 120/90-18 65M; Verified, read off the manual page: Manual p. 72 · checked 2026-09-26 source [2]

Suspension

3 of 7 filled

Fork: 49mm inverted Showa coil-spring fork; Research level: Spec sheet (research) · checked 2026-09-25 source [1]
Fork travel: 12.2 in. (≈ 310 mm, converted by MotoXSports); Research level: Spec sheet (research) · converted from 12.2 in. · checked 2026-09-25 source [1]
Shock travel: 12.1 in. (≈ 307 mm, converted by MotoXSports); Research level: Spec sheet (research) · converted from 12.1 in. · checked 2026-09-25 source [1]
Stock fork spring rate: Not yet verified
Stock shock spring rate: Not yet verified
Static sag, bike only: Not yet verified
Race sag, rider on: Not yet verified

Fluids and capacities

4 of 4 filled

Engine oil spec: SAE 10W-30, JASO T 903 MA; Verified, read off the manual page: Manual p. 73 · checked 2026-09-26 source [2]
Engine oil capacity: 1.00 L (≈ 33.8 fl oz, converted by MotoXSports); Verified, read off the manual page: Manual p. 73 · checked 2026-09-26 source [2]
Coolant capacity: 1.08 L (≈ 36.5 fl oz, converted by MotoXSports); Verified, read off the manual page: Manual p. 73 · checked 2026-09-26 source [2]
Fuel capacity: 8.0 L (≈ 2.11 gal, converted by MotoXSports); Verified, read off the manual page: Manual p. 72 · checked 2026-09-26 source [2]

Maintenance

2 of 3 filled

Tire pressure (off-road): 15 psi (100 kPa) front and rear; Verified, read off the manual page: Manual p. 72 · checked 2026-09-26 source [2]
Chain slack: Not yet verified
Spark plug and gap: NGK SILMAR9A-9S, gap 0.80-0.90 mm; Verified, read off the manual page: Manual p. 74 · checked 2026-09-26 source [2]

Dimensions

3 of 3 filled

Seat height: 958 mm (≈ 37.7 in, converted by MotoXSports); Verified, read off the manual page: Manual p. 72 · checked 2026-09-26 source [2]
Wheelbase: 1478 mm (≈ 58.2 in, converted by MotoXSports); Verified, read off the manual page: Manual p. 72 · checked 2026-09-26 source [2]
Weight: 256 lbs. (≈ 116.1 kg, converted by MotoXSports); Research level: Spec sheet (research) · converted from 256 lbs. · checked 2026-09-25 source [1]

Service specs

0 of 6 filled

Fork oil, brake fluid, coolant type, fuel octane, idle speed, valve clearance: Not yet verified

Solid marks are owner's-manual pages; hollow marks are manufacturer web or spec-sheet figures still waiting on a manual page. Last reviewed 2026-09-26. Rows marked not yet verified are blank on purpose.

Buying parts

The stock sizes and specs this bike left the factory with, each with its source. Take them to any shop.

Retailer links below are affiliate links: we may earn a commission, at no cost to you, and it never changes the specs. Affiliate disclosure.

Chain: Chain pitch 520 Manufacturer spec sheet (research)520 chains at MotoSport 520 master links at MotoSport
Sprockets: Stock front sprocket 13T Manufacturer spec sheet (research)Stock rear sprocket 50T Manufacturer spec sheet (research)13T front sprockets at MotoSport 50T rear sprockets at MotoSport
Tires: Front tire 90/90-21 54M Owner's manual p. 72Rear tire 120/90-18 65M Owner's manual p. 72Front tires 90/90-21 at MotoSport Tubes 90/90-21 at MotoSport Rear tires 120/90-18 at MotoSport
Engine oil: Engine oil spec SAE 10W-30, JASO T 903 MA Owner's manual p. 73Engine oil capacity 1000 ml (33.8 fl oz) Owner's manual p. 73Engine oil at MotoSport
Coolant: Coolant capacity 1080 ml (36.5 fl oz) Owner's manual p. 73Coolant at MotoSport

In stock at MotoSport

Prices from MotoSport’s catalog of Oct 26, 2026; check today’s price before you buy.

Front tire, stock size 90/90-21

Rear tire, stock size 120/90-18

Engine oil, stock viscosity 10W-30

Matched on viscosity only. The manual prints: SAE 10W-30, JASO T 903 MA. Check the label for the rest.

Prices and stock from MotoSport's product catalog on Oct 26, 2026; they change, so check the price at MotoSport before you buy. Products are chosen by exact stock size, code or oil viscosity from the specs above, known brands first, then price. We have not tested them.

3 part specs not yet verified; see data coverage.

Use this bike

Tools for this bike

Compare with

Comparisons with other bikes use the newest model year on file: Honda CRF450RX 2027.

Other model years

2026 vs 2027, side by side

Service schedule

33 rows from the owner's manual schedule, pp. 36-38, counted in races, at these intervals:

Each race or about 3.5 hours
Every 2 races or about 7.5 hours
Every 4 races or about 15.0 hours
Every 6 races or about 22.5 hours
Every 8 races or about 30.0 hours

Check what's due or track it in My Bike. Buying one used? The hours check lists what the schedule calls for by its meter reading.

Gearing calculator

Gearing for this bike

Put your current gearing in Setup A and the setup you are considering in Setup B. Everything updates as you type.

Start from a bike's stock gearing

Pick a bike to fill both setups with its stock sprockets.

Front sprockets 8–16 teeth, rear 34–60. Values outside that range are brought back to the nearest limit.

Setup A — what you run now

Front teeth

Rear teeth

Setup B — what you are thinking about

Front teeth

Rear teeth

Final drive ratio

— — : 1

—

Pull at the wheel—

Top speed—

Ratio change—

A —

B —

Taller · more speed Shorter · more pull

—

Changing the rear sprocket changes the chain length too. The chain length calculator works it out from the chain you have now, with where the axle ends up.

Ratios are exact. The chain figure is an estimate of roughly one link per two teeth of change — confirm against your manual before ordering.

What's missing

10 of 31 fields read off a manual page.

Not yet verified (14): chain links, front rim, rear rim, fork spring rate, shock spring rate, static sag, race sag, chain slack, fork oil, brake fluid, coolant type, fuel octane, idle speed, valve clearance.

From a spec sheet, awaiting a manual page (7): front sprocket, rear sprocket, chain pitch, fork, fork travel, shock travel, weight.

See coverage for every bike

Sources

1
American Honda press release: 2026 Honda CRF450RX Specifications (May 20, 2025)Manufacturer web or spec sheet, research level. Covers stock front sprocket, stock rear sprocket, chain pitch, fork, fork travel, shock travel, weight; checked 2026-09-25.
2
Honda 2026 CRF450R/RX/RWE Owner's Manual (31MKE691); owner-supplied copy of Honda's PDFpp. 72, 73, 74Manual page, verified. Covers stock final drive ratio, front tire, rear tire, engine oil spec, engine oil capacity, coolant capacity, fuel capacity, tire pressure (off-road), spark plug and gap, seat height, wheelbase; checked 2026-09-26.

Always confirm against the manual for your exact year before ordering parts or setting up suspension. Torque specs are deliberately not published here. How we verify a value.

Your manual prints something different? Report a value with the page it is on; every fix is listed in the corrections log.

My settings

Date / track
Sprockets run
Race sag / free sag
Fork air pressure or spring
Fork clickers (compression / rebound)
Shock clickers (low / high / rebound)
Tire pressures (front / rear)
Notes

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