2019 Yamaha YZ85 Specifications

Name: 2019 Yamaha YZ85
Brand: Yamaha

Cross / motocross • Specs last verified 13 July 2026

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2019 Yamaha YZ85 Overview

The 2019 Yamaha YZ85 is a cross / motocross motorcycle built around 85 cc of displacement. Under the tank sits a Single cylinder, two-stroke engine, a compression ratio of 8.2:1. The bore and stroke measures 47.5 x 47.8 mm. From a practical standpoint, the 2019 YZ85 tips the scales at 73 kg, carries a 4.92-litre fuel tank, offers a seat height of 841 mm and spans a 1255 mm wheelbase. That's roughly 25.6 kg lighter than the average cross / motocross motorcycle in our database. Scroll down for the complete 2019 Yamaha YZ85 spec sheet covering every technical detail from suspension travel to tyre sizes.

2019 YZ85 - Pros & Cons

Strengths

Factory engineering: The 2019 Yamaha YZ85 represents Yamaha's engineering at the time, with a specification built around real-world usability.

Considerations

Carburetor fuelling: Carbureted engines need occasional jetting attention and can be reluctant in cold weather or at altitude compared to modern fuel-injected alternatives.
Tall seat height: The 841 mm seat height will challenge shorter riders - tiptoeing at low speeds is something to factor into your decision.
Modest fuel capacity: The 4.92-litre tank means more frequent fuel stops on longer rides, which is worth planning around on touring routes.
Chain final drive upkeep: Chain final drive needs regular cleaning, lubrication and tension checks to get full life out of the sprockets.

Wear Points & Servicing Notes

Carburetor maintenance

The YZ85 uses carburetion rather than fuel injection, which means jetting is altitude- and temperature-sensitive and benefits from a clean-and-rejet after extended storage or an exhaust change.

Brake disc and pad wear

The Single disc. Hydraulic. front brake gives strong, progressive stopping power. Disc thickness and pad depth are worth checking at every tyre change, since worn pads can score the disc surface.

Suspension condition on used examples

Up front, the YZ85 runs Inverted fork and Single shock at the rear. On a used example, check fork seals for weeping oil and test the rear linkage for play - seals are a relatively cheap fix but useful when negotiating price.

Final drive maintenance

Final drive is by chain - expect to clean and lube it every few hundred kilometres and check tension regularly; a neglected chain wears the sprockets faster than the chain itself.

Frame & chassis check

The frame is Semi-double-cradle frame - worth a visual check for corrosion or impact damage around the head-stock and swingarm pivot on any used example, since frame damage is far costlier to fix than any service item.

Low-speed handling

At just 73 kg, the YZ85 is light enough to manhandle easily at a standstill - one of the practical advantages of its class.

YZ85 - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2019 Yamaha YZ85, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained YZ85 should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any YZ85. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

Carburetor upkeep

Keep the carburetors clean and free of deposits. If the YZ85 has been stored, strip and clean the carb float bowls before attempting to start it. Pilot jets are the first to block and the last to be checked - always include them in any carb rebuild.

2019 Yamaha YZ85 - Frequently Asked Questions

What engine does the 2019 Yamaha YZ85 have?

The 2019 Yamaha YZ85 uses a Single cylinder, two-stroke engine with 85 cc of displacement.

How much does the 2019 Yamaha YZ85 weigh?

The 2019 Yamaha YZ85 weighs 73 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 2019 Yamaha YZ85?

The 2019 Yamaha YZ85 has a 4.92-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 82-98 km between stops.

Is the 2019 Yamaha YZ85 suitable for shorter riders?

The 2019 Yamaha YZ85 has a seat height of 841 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.

What brakes does the 2019 Yamaha YZ85 have?

The 2019 Yamaha YZ85 uses Single disc. Hydraulic. at the front and Single disc. Hydraulic. at the rear.

What tyre sizes does the 2019 Yamaha YZ85 use?

The front tyre size on the 2019 Yamaha YZ85 is 70/100-17.

What fuel system does the 2019 Yamaha YZ85 use?

The 2019 Yamaha YZ85 uses Carburettor. Keihin PWK 28, providing precise fuelling across the rev range and reliable cold-start behaviour.

Yamaha YZ85 Spec Evolution

The Yamaha YZ85 was produced across 21 model years (2002-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2002	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Wet Weight	-	-	-	-	-	-	70.8 kg / 156.0 lbs	70.8 kg / 156.0 lbs	70.8 kg / 156.0 lbs	71.2 kg / 157.0 lbs	71.2 kg / 157.0 lbs	71.2 kg / 157.0 lbs	71.2 kg / 157.0 lbs	71.2 kg / 157.0 lbs	71.2 kg / 157.0 lbs	71.2 kg / 157.0 lbs	73.0 kg / 161.0 lbs	73.0 kg / 161.0 lbs	73.0 kg / 161.0 lbs	73.0 kg / 161.0 lbs	73.0 kg / 161.0 lbs
Dry Weight	66 kg / 145.5 lbs	66 kg / 145.5 lbs	-	66 kg / 145.5 lbs	66.2 kg / 146.0 lbs	66.2 kg / 146.0 lbs	-	-	-	-	210.5 kg / 464.1 lbs	59 kg / 130.1 lbs	-	-	-	-	-	-	-	-	-
Engine Detail	-	-	-	-	-	-	-	-	-	Reed-valve inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted
Engine Type	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke
Seat Height	864 mm / 34.0 in.	864 mm / 34.0 in.	-	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	864 mm / 34.0 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.	841 mm / 33.1 in.
Fuel Capacity	-	-	-	-	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 gallons	4.92 litres / 1.30 US gallons	4.92 litres / 1.30 US gallons	4.92 litres / 1.30 US gallons	4.92 litres / 1.30 US gallons	4.92 litres / 1.30 US gallons
Bore x Stroke (in,)	1.9 x 1.9 inches	1.9 x 1.9 inches	2.1 x inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches	1.9 x 1.9 inches
Bore x Stroke (mm)	47.5 x 47.8 mm	47.5 x 47.8 mm	54.0 x 0.0 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm	47.5 x 47.8 mm

Key Specifications

Engine

Single cylinder, two-stroke

Power

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

Weight

73.0 kg / 161.0 lbs

Fuel Capacity

4.92 litres / 1.30 US gallons

Full 2019 Yamaha YZ85 Specifications

Colours Team Yamaha Blue

Warranty 30 Day Limited Factory Warranty

Ground Clearance (in.) 13.0 inches

Ground Clearance (mm) 330 mm

Seat Height 841 mm / 33.1 in.

Wheelbase 1255 mm / 49.4 in.

Height 1146 mm / 45.1 in.

Length 1821 mm / 71.7 in.

Width 759 mm / 29.9 in.

Fuel Capacity 4.92 litres / 1.30 US gallons

Wet Weight 73.0 kg / 161.0 lbs

Bore x Stroke (in,) 1.9 x 1.9 inches

Bore x Stroke (mm) 47.5 x 47.8 mm

Displacement (cc) 85.0 cc

Displacement (ci) 5.19 cubic inches

Engine Type Single cylinder, two-stroke

Engine Detail Reed-valve-inducted

Fuel System Carburettor. Keihin PWK 28

Compression Ratio 8.2:1

Ignition CDI

Starter Electric

Clutch Wet multi-disc

Final Drive Chain (final drive)

Gearbox 6-speed

Frame Type Semi-double-cradle frame

Suspension - Front Inverted fork

Suspension - Rear Single shock

Rake 28.0°

Wheel Travel - Front 274 mm / 10.8 in.

Wheel Travel - Rear 282 mm / 11.1 in.

Brakes - Front Single disc. Hydraulic.

Brakes - Rear Single disc. Hydraulic.

Rims Dunlop tyres

Tyres - Front 70/100-17

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.