The Garage

Motocross

Stock-size parts in stock at MotoSport

Honda CRF250R 2027

Motocross, 250cc 4T

Partly verified

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

From the owner’s manual: engine oil capacity 1.05 L, p. 73; coolant 1.04 L, p. 74; front tire 80/100-21 M/C 51M, p. 73; rear tire 100/90-19 57M, p. 73. Checked 16 Oct 2026.

No CPSC recall found for the 2027 Honda CRF250R, checked 2026-10-15. Recalls

Spec card PDF

Gearing

4 of 5 filled

Stock front sprocket
13T
Research level: Spec sheet (research) · checked 2026-09-28 source [1]
Stock rear sprocket
50T
Research level: Spec sheet (research) · checked 2026-09-28 source [1]
Chain pitch
520
Research level: Spec sheet (research) · checked 2026-09-28 source [1]
Stock chain links
Not yet verified
Stock final drive ratio
3.846 : 1
Verified, read off the manual page: Manual p. 74 · checked 2026-09-28 source [2]

Wheels and tires

2 of 4 filled

Front rim
Not yet verified
Rear rim
Not yet verified
Front tire
80/100-21 M/C 51M
Verified, read off the manual page: Manual p. 73 · checked 2026-09-28 source [2]
Rear tire
100/90-19 57M
Verified, read off the manual page: Manual p. 73 · checked 2026-09-28 source [2]

Suspension

3 of 7 filled

Fork
49mm inverted Showa fork
Research level: Spec sheet (research) · checked 2026-09-28 source [1]
Fork travel
12.2-inch (≈ 310 mm, converted by MotoXSports)
Research level: Spec sheet (research) · converted from 12.2-inch · checked 2026-09-28 source [1]
Shock travel
12.1-inch (≈ 307 mm, converted by MotoXSports)
Research level: Spec sheet (research) · converted from 12.1-inch · checked 2026-09-28 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

5 of 5 filled

Engine oil spec
SAE 10W-30, JASO T 903 MA
Verified, read off the manual page: Manual p. 73 · checked 2026-09-28 source [2]
Engine oil capacity (after draining)
1.05 L (≈ 35.5 fl oz, converted by MotoXSports)
Verified, read off the manual page: Manual p. 73 · checked 2026-09-28 source [2]
Engine oil capacity, with filter change
1.08 L (≈ 36.5 fl oz, converted by MotoXSports)
Verified, read off the manual page: Manual p. 73 · checked 2026-10-16 source [2]
Coolant capacity
1.04 L (≈ 35.2 fl oz, converted by MotoXSports)
Verified, read off the manual page: Manual p. 74 · checked 2026-09-28 source [2]
Fuel capacity
6.3 L (≈ 1.66 gal, converted by MotoXSports)
Verified, read off the manual page: Manual p. 73 · checked 2026-09-28 source [2]

Service specs

4 of 6 filled

Fork oil
Not yet verified
Brake fluid
Not yet verified
Coolant type
Pro Honda HP Coolant
Verified, read off the manual page: Manual p. 74 · checked 2026-10-16 source [2]
Fuel octane
Unleaded gasoline, pump octane number of 91 or higher
Verified, read off the manual page: Manual p. 73 · checked 2026-10-16 source [2]
Idle speed
2,000 ± 100 rpm
Verified, read off the manual page: Manual p. 73 · checked 2026-10-16 source [2]
Valve clearance
Intake 0.004 ± 0.001 in (0.10 ± 0.03 mm); Exhaust 0.008 ± 0.001 in (0.20 ± 0.03 mm), cold
Verified, read off the manual page: Manual p. 73 · checked 2026-10-16 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. 73 · checked 2026-09-28 source [2]
Chain slack
Not yet verified
Spark plug and gap
NGK SILMAR9A9S, gap 0.8-0.9 mm
Verified, read off the manual page: Manual p. 74 · checked 2026-09-28 source [2]

Dimensions

3 of 3 filled

Seat height
955 mm (≈ 37.6 in, converted by MotoXSports)
Verified, read off the manual page: Manual p. 72 · checked 2026-09-28 source [2]
Wheelbase
1483 mm (≈ 58.4 in, converted by MotoXSports)
Verified, read off the manual page: Manual p. 72 · checked 2026-09-28 source [2]
Weight
234 pounds (≈ 106.1 kg, converted by MotoXSports)
Research level: Spec sheet (research) · converted from 234 pounds · checked 2026-09-28 source [1]
Solid marks are owner's-manual pages; hollow marks are manufacturer web or spec-sheet figures still waiting on a manual page. Last reviewed 2026-10-16. 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 MotoSport520 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 MotoSport50T rear sprockets at MotoSport
Tires
Front tire 80/100-21 M/C 51M Owner's manual p. 73Rear tire 100/90-19 57M Owner's manual p. 73Front tires 80/100-21 at MotoSportTubes 80/100-21 at MotoSportRear tires 100/90-19 at MotoSportTubes 100/90-19 at MotoSport
Engine oil
Engine oil spec SAE 10W-30, JASO T 903 MA Owner's manual p. 73Engine oil capacity (after draining) 1050 ml (35.5 fl oz) Owner's manual p. 73Engine oil at MotoSport
Coolant
Coolant capacity 1040 ml (35.2 fl oz) Owner's manual p. 74Coolant 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 80/100-21

Rear tire, stock size 100/90-19

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.

Tools for this bike

Compare with

All 27 comparisons for this bike

Other model years

All 3 model years, 2024 to 2027, side by side

Service schedule

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

  • Each race or about 2.5 hours
  • Every 3 races or about 7.5 hours
  • Every 6 races or about 15.0 hours
  • Every 9 races or about 22.5 hours
  • Every 12 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.

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
Setup B — what you are thinking about
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

14 of 31 fields read off a manual page.

Not yet verified (10): chain links, front rim, rear rim, fork spring rate, shock spring rate, static sag, race sag, chain slack, fork oil, brake fluid.

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. 1
    American Honda 2027 CRF250R specifications (preliminary)Manufacturer web or spec sheet, research level. Covers stock front sprocket, stock rear sprocket, chain pitch, fork, fork travel, shock travel, weight; checked 2026-09-28.
  2. 2
    Honda 2027 CRF250R/RX/HRC Works Edition Owner's Manual (31K95690); 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 (after draining), coolant capacity, fuel capacity, tire pressure (off-road), spark plug and gap, seat height, wheelbase, engine oil figure, as labelled, engine oil capacity, with filter change, coolant type, fuel octane, idle speed, valve clearance; checked 2026-10-16.

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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