2020 Yamaha YZ85 Specifications

Name: 2020 Yamaha YZ85
Brand: Yamaha

Cross / motocross • Specs last verified 13 July 2026

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2020 Yamaha YZ85 Overview

For 2020, Yamaha offers the YZ85 as a cross / motocross motorcycle with 85 cc on tap. The 2020 Yamaha YZ85 is built around a Single cylinder, two-stroke engine, a compression ratio of 9.6:1. Internally, bore and stroke are 47.5 x 47.8 mm. In everyday use, the 2020 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. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2020 Yamaha YZ85 spec sheet below.

2020 YZ85 - Pros & Cons

Strengths

Factory engineering: There's nothing exotic about the 2020 Yamaha YZ85's spec sheet - just solid, proven engineering for what it's meant to do.

Considerations

Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.
Tall seat height: A 841 mm seat puts flat-footing out of reach for a lot of riders - sit on it in person before committing.
Modest fuel capacity: A 4.92-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.

Wear Points & Servicing Notes

Carburetor maintenance

Being carbureted, the YZ85 is more sensitive to stale fuel and altitude changes than a fuel-injected bike - a carb clean and rejet restores crisp throttle response after any extended lay-up.

Brake disc and pad wear

Single disc. Hydraulic. up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.

Suspension condition on used examples

Suspension duties are handled by Inverted fork up front and Single shock at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.

Final drive maintenance

Chain final drive on the YZ85 means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.

Frame & chassis check

The Semi-double-cradle frame chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.

Low-speed handling

The YZ85's 73 kg kerb weight makes low-speed control noticeably less effort than on a heavier machine.

YZ85 - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2020 Yamaha YZ85 should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept YZ85 settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a YZ85's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.

Carburetor upkeep

A YZ85 that's sat unused is almost always a carb-cleaning job before it runs right again - float bowls and pilot jets first, since they clog before anything else.

2020 Yamaha YZ85 - Frequently Asked Questions

What engine does the 2020 Yamaha YZ85 have?

The 2020 Yamaha YZ85 uses a Single cylinder, two-stroke engine with 85 cc of displacement.

How much does the 2020 Yamaha YZ85 weigh?

The 2020 Yamaha YZ85 weighs 73 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 2020 Yamaha YZ85?

The 2020 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 2020 Yamaha YZ85 suitable for shorter riders?

The 2020 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 2020 Yamaha YZ85 have?

The 2020 Yamaha YZ85 uses Single disc. Hydraulic. at the front and Single disc. Hydraulic. at the rear.

What tyre sizes does the 2020 Yamaha YZ85 use?

The front tyre size on the 2020 Yamaha YZ85 is 70/100-17.

What fuel system does the 2020 Yamaha YZ85 use?

The 2020 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 2020 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 9.6:1

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 26.3°

Trail 89 mm / 3.5 in.

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.