Motocross

Yamaha YZ85 2027

Motocross, 85cc 2T, US version

Partly verified

From the owner’s manual: premix 30:1, p. 4-4; coolant 0.55 L, p. 9-1; front tire 70/100-17 40M, p. 9-1; rear tire 90/100-14 49M, p. 9-1. Checked 28 Sep 2026.

Model year on file: 2027 only. Other years are added as their manuals are read.

No CPSC recall found for the 2027 Yamaha YZ85, checked 2026-10-15. Recalls

Spec card PDF

Wheels and tires

2 of 4 filled

Front rim: Not yet verified
Rear rim: Not yet verified
Front tire: 70/100-17 40M; Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]
Rear tire: 90/100-14 49M; Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]

Suspension

3 of 7 filled

Fork: Telescopic fork; Verified, read off the manual page: Manual p. 9-2 · checked 2026-09-28 source [1]
Fork travel: 10.8-in (≈ 274 mm, converted by MotoXSports); Research level: Spec sheet (research) · converted from 10.8-in · checked 2026-09-27 source [2]
Shock travel: 11.1-in (≈ 282 mm, converted by MotoXSports); Research level: Spec sheet (research) · converted from 11.1-in · checked 2026-09-27 source [2]
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: 0.55 L (≈ 18.6 fl oz, converted by MotoXSports); Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]
Premix ratio: 30:1; Verified, read off the manual page: Manual p. 4-4 · checked 2026-09-28 source [1]
Fuel capacity: 5.0 L (1.3 US gal); Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]

Maintenance

2 of 3 filled

Tire pressure (off-road): 100 kPa (15 psi) front and rear; Verified, read off the manual page: Manual p. 7-14 · checked 2026-09-28 source [1]
Chain slack: 58-68 mm (2.28-2.68 in); Verified, read off the manual page: Manual p. 7-20 · checked 2026-09-28 source [1]
Spark plug and gap: Not yet verified

Dimensions

3 of 3 filled

Seat height: 840 mm (33.1 in); Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]
Wheelbase: 1255 mm (49.4 in); Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]
Weight: 73 kg (161 lb); Verified, read off the manual page: Manual p. 9-1 · checked 2026-09-28 source [1]

Gearing

0 of 5 filled

Stock front sprocket, stock rear sprocket, chain pitch, stock chain links, stock final drive ratio: Not yet verified

Service specs

0 of 6 filled

Gearbox oil, fork oil, brake fluid, coolant type, fuel octane, idle speed: 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 2026-09-28. 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.

Tires: Front tire 70/100-17 40M Owner's manual p. 9-1Rear tire 90/100-14 49M Owner's manual p. 9-1Front tires 70/100-17 at MotoSport Tubes 70/100-17 at MotoSport Rear tires 90/100-14 at MotoSport Tubes 90/100-14 at MotoSport
Coolant: Coolant capacity 550 ml (18.6 fl oz) Owner's manual p. 9-1Coolant 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 70/100-17

Rear tire, stock size 90/100-14

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.

6 part specs not yet verified; see data coverage.

Use this bike

Tools for this bike

Compare with

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Service schedule

62 rows from the owner's manual schedule, pp. 7-2 to 7-6, counted in races, at these intervals:

After break-in
Every race
Every third race
Every fifth race
As required

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.

Riding

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

Gearing tool

The calculator prefills from this bike once its stock sprockets are verified. It works with any numbers in the meantime.

Open the gearing calculator

What's missing

11 of 30 fields read off a manual page.

Not yet verified (17): front sprocket, rear sprocket, chain pitch, chain links, front rim, rear rim, fork spring rate, shock spring rate, static sag, race sag, spark plug and gap, gearbox oil, fork oil, brake fluid, coolant type, fuel octane, idle speed.

From a spec sheet, awaiting a manual page (2): fork travel, shock travel.

See coverage for every bike

Sources

1
Yamaha 2027 YZ85 Owner's Manual, DA8-28199-80; owner-supplied copy from Yamaha's Owner's Manual Librarypp. 4-4, 7-14, 7-20, 9-1, 9-2Manual page, verified. Covers front tire, rear tire, fork, coolant capacity, fuel capacity, premix ratio, tire pressure (off-road), chain slack, seat height, wheelbase, weight; checked 2026-09-28.
2
Yamaha 2027 YZ85 specifications (yamahamotorsports.com)Manufacturer web or spec sheet, research level. Covers fork travel, shock travel; checked 2026-09-27.

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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