The Garage

Motocross

Stock-size parts in stock at MotoSport

Kawasaki KX85 2025

Motocross, 84cc 2T, US version

Partly verified

From the owner’s manual: premix 32:1, p. 15; coolant 0.57 L (0.60 US qt), p. 48; front tire 70/100-17 40M, p. 17; rear tire 90/100-14 49M, p. 17. Checked 16 Oct 2026.

No CPSC recall found for the 2025 Kawasaki KX85, checked 2026-10-15. Recalls

Kawasaki KX85 2025

Workshop card from motoxsports.com/bikes/kawasaki-kx85-2025/ · each figure as the maker’s document prints it, with its source number; ≈ marks a figure we converted. Torque values are not published: use the manual.

Gearing

3 of 5 filled

Stock front sprocket
14T
Verified, read off the manual page: Manual p. 16 · checked 2026-10-14 source [1]
Stock rear sprocket
51T
Verified, read off the manual page: Manual p. 16 · checked 2026-10-14 source [1]
Chain pitch
Not yet verified
Stock chain links
Not yet verified
Stock final drive ratio
3.643 : 1
Verified, read off the manual page: Manual p. 16 · checked 2026-10-14 source [1]

Wheels and tires

4 of 4 filled

Front rim
17 x 1.40
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 source [1]
Rear rim
14 x 1.60
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 source [1]
Front tire
70/100-17 40M
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 source [1]
Rear tire
90/100-14 49M
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 source [1]

Suspension

3 of 7 filled

Fork
Telescopic fork (upside-down)
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 source [1]
Fork travel
275 mm (10.83 in.)
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 source [1]
Shock travel
275 mm (10.83 in.)
Verified, read off the manual page: Manual p. 17 · checked 2026-10-14 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

3 of 3 filled

Coolant capacity
0.57 L (0.60 US qt)
Verified, read off the manual page: Manual p. 48 · checked 2026-10-14 source [1]
Premix ratio
32:1
Verified, read off the manual page: Manual p. 15 · checked 2026-10-14 source [1]
Fuel capacity
5.0 L (1.3 US gal)
Verified, read off the manual page: Manual p. 13 · checked 2026-10-14 source [1]

Service specs

5 of 6 filled

Gearbox oil
Transmission Oil: Grade API SG, SH, SJ, SL or SM with JASO MA, MA1 or MA2; Viscosity SAE 10W-40; Amount 0.7 L (0.74 US qt)
Verified, read off the manual page: Manual p. 16 · checked 2026-10-16 source [1]
Fork oil
Type Kawasaki Fork Oil KHL15-10; Amount 295 – 325 mL (9.97 – 11.0 US oz.)
Verified, read off the manual page: Manual p. 17 · checked 2026-10-16 source [1]
Brake fluid
Front DOT3 or DOT4; Rear DOT4
Verified, read off the manual page: Manual p. 18 · checked 2026-10-16 source [1]
Coolant type
Permanent type of antifreeze (soft water and ethylene glycol plus corrosion and rust inhibitor chemicals for aluminum engines and radiators); Soft water 50%, coolant 50%
Verified, read off the manual page: Manual p. 48 · checked 2026-10-16 source [1]
Fuel octane
Antiknock Index 90
Verified, read off the manual page: Manual p. 27 · checked 2026-10-16 source [1]
Idle speed
Not yet verified

Maintenance

3 of 3 filled

Tire pressure (off-road)
100 – 125 kPa (1.02 – 1.27 kgf/cm², 14.5 – 18.1 psi) front and rear, when cold
Verified, read off the manual page: Manual p. 137 · checked 2026-10-14 source [1]
Chain slack
54 – 64 mm (2.1 – 2.5 in.)
Verified, read off the manual page: Manual p. 98 · checked 2026-10-14 source [1]
Spark plug and gap
NGK R6252K-105
Verified, read off the manual page: Manual p. 15 · checked 2026-10-14 source [1]

Dimensions

2 of 3 filled

Seat height
Not yet verified
Wheelbase
1 260 mm (49.61 in.)
Verified, read off the manual page: Manual p. 13 · checked 2026-10-14 source [1]
Weight (curb Mass)
74.6 kg (164 lb)
Verified, read off the manual page: Manual p. 13 · checked 2026-10-14 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.

Sprockets
Stock front sprocket 14T Owner's manual p. 16Stock rear sprocket 51T Owner's manual p. 1614T front sprockets at MotoSport51T rear sprockets at MotoSport
Tires
Front tire 70/100-17 40M Owner's manual p. 17Rear tire 90/100-14 49M Owner's manual p. 17Front tires 70/100-17 at MotoSportTubes 70/100-17 at MotoSportRear tires 90/100-14 at MotoSportTubes 90/100-14 at MotoSport
Coolant
Coolant capacity 570 ml (19.3 fl oz) Owner's manual p. 48Coolant at MotoSport

In stock at MotoSport

Prices from MotoSport’s catalog of Oct 14, 2026; check today’s price before you buy.

Front tire, stock size 70/100-17

Rear tire, stock size 90/100-14

Prices and stock from MotoSport's product catalog on Oct 14, 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.

4 part specs not yet verified; see data coverage.

Tools for this bike

Compare with

Comparisons with other bikes use the newest model year on file: Kawasaki KX85 2027.

Other model years

All 3 model years, 2025 to 2027, side by side

Riding

Where kids can ride: tracks and areas whose own pages mention young riders.

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

22 of 30 fields read off a manual page.

Not yet verified (8): chain pitch, chain links, fork spring rate, shock spring rate, static sag, race sag, seat height, idle speed.

See coverage for every bike

Sources

  1. 1
    Kawasaki Owner's Manual, OWNER'S MANUAL, KX85C/KX112A (2025), item 99814-0013 (© 2024 Kawasaki Motors, Ltd., Feb. 15, 2024); Kawasaki e-book on pws.ktivs.net, opened from the kawasaki.com owner portal; no model year printed, Kawasaki's own owner's manual portal lists it for model year 2025 (owner decision 2026-10-12)pp. 13, 15, 16, 17, 18, 27, 48, 98, 137Manual page, verified. Covers stock front sprocket, stock rear sprocket, stock final drive ratio, front tire, rear tire, front rim, rear rim, fork, fork travel, shock travel, coolant capacity, fuel capacity, premix ratio, tire pressure (off-road), spark plug and gap, chain slack, wheelbase, weight (curb Mass), weight, as labelled, gearbox oil, fork oil, brake fluid, coolant type, fuel octane; 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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