Motocross

Kawasaki KX250F 2007–2008

Motocross, 249cc 4T

Verified

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

From the owner’s manual: engine oil capacity 1.5 L (1.6 US qt), p. 1-8; front tire 80/100-21 51M, p. 1-9; rear tire 100/90-19 57M, p. 1-9. Checked 25 Sep 2026.

No CPSC recall found for the 2007–2008 Kawasaki KX250F, checked 2026-10-15. Recalls

Spec card PDF

Gearing

4 of 5 filled

Stock front sprocket: 13T; Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]
Stock rear sprocket: 48T; Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]
Chain pitch: 520; Verified, read off the manual page: Manual p. 2-35 · checked 2026-09-25 source [1]
Stock chain links: Not yet verified
Stock final drive ratio: 3.69 : 1; Calculated, not printed: Calculated from the stock sprockets, printed on manual p. 1-9

Wheels and tires

4 of 4 filled

Front rim: 21 x 1.60; Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]
Rear rim: 19 x 1.85; Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]
Front tire: 80/100-21 51M; Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]
Rear tire: 100/90-19 57M; Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]

Suspension

2 of 7 filled

Fork: Not yet verified
Fork travel: 315 mm (12.4 in.); Verified, read off the manual page: Manual p. 1-9 · checked 2026-09-25 source [1]
Shock travel: 310 mm (12.2 in.); Verified, read off the manual page: Manual p. 1-9 · 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

2 of 4 filled

Engine oil spec: Not yet verified
Engine oil capacity: 1.5 L (1.6 US qt); Verified, read off the manual page: Manual p. 1-8 · checked 2026-09-25 source [1]
Coolant capacity: Not yet verified
Fuel capacity: 7.2 L (1.9 US gal); Verified, read off the manual page: Manual p. 1-8 · checked 2026-09-25 source [1]

Maintenance

1 of 3 filled

Tire pressure (off-road): Not yet verified
Chain slack: Not yet verified
Spark plug and gap: NGK CR8E; Verified, read off the manual page: Manual p. 1-8 · checked 2026-09-25 source [1]

Dimensions

2 of 3 filled

Seat height: 955 mm (37.6 in.); Verified, read off the manual page: Manual p. 1-8 · checked 2026-09-25 source [1]
Wheelbase: 1 469 mm (57.83 in.); Verified, read off the manual page: Manual p. 1-8 · checked 2026-09-25 source [1]
Weight: Not yet verified

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 2026-09-25. 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 Owner's manual p. 2-35520 chains at MotoSport 520 master links at MotoSport
Sprockets: Stock front sprocket 13T Owner's manual p. 1-9Stock rear sprocket 48T Owner's manual p. 1-913T front sprockets at MotoSport 48T rear sprockets at MotoSport
Tires: Front tire 80/100-21 51M Owner's manual p. 1-9Rear tire 100/90-19 57M Owner's manual p. 1-9Front tires 80/100-21 at MotoSport Tubes 80/100-21 at MotoSport Rear tires 100/90-19 at MotoSport Tubes 100/90-19 at MotoSport
Engine oil: Engine oil capacity 1500 ml (50.7 fl oz) Owner's manual p. 1-8Engine oil 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

Spark plug, stock NGK CR8E

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.

5 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: Kawasaki KX250F 2027.

Other model years

2007–2008 vs 2027, side by side

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

14 of 31 fields read off a manual page.

Not yet verified (17): chain links, fork, fork spring rate, shock spring rate, static sag, race sag, engine oil spec, coolant capacity, weight, tire pressure (off-road), chain slack, fork oil, brake fluid, coolant type, fuel octane, idle speed, valve clearance.

See coverage for every bike

Sources

1
Kawasaki KX250F Motorcycle Service Manual (KX250T6F-T8F, 2006-2008); owner-supplied copypp. 1-8, 1-9, 2-35Manual page, verified. Covers stock front sprocket, stock rear sprocket, chain pitch, front tire, rear tire, front rim, rear rim, fork travel, shock travel, engine oil capacity, fuel capacity, seat height, wheelbase, spark plug and gap; checked 2026-09-25.

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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