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2020 Yamaha YZ250X Overview
The 2020 Yamaha YZ250X is an enduro / off-road motorcycle built around 249 cc of displacement. Under the tank sits a Single cylinder, two-stroke engine, a compression ratio of 9.4:1. The bore and stroke measures 66 x 72 mm. From a practical standpoint, the 2020 YZ250X tips the scales at 103.9 kg, carries a 7.95-litre fuel tank, offers a seat height of 970 mm and spans a 1486 mm wheelbase. That's roughly 94.9 kg lighter than the average enduro / off-road motorcycle in our database. Scroll down for the complete 2020 Yamaha YZ250X spec sheet covering every technical detail from suspension travel to tyre sizes.
2020 YZ250X - Pros & Cons
Strengths
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Fuel injection: The fuel injection system delivers crisp throttle response and reliable cold starts regardless of altitude or temperature.
Considerations
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Tall seat height: The 970 mm seat height will challenge shorter riders - tiptoeing at low speeds is something to factor into your decision.
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Modest fuel capacity: The 7.95-litre tank means more frequent fuel stops on longer rides, which is worth planning around on touring routes.
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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
Fuelling & injector care
Fuelling comes from fuel injection. Systems like this are largely maintenance-free beyond keeping fuel quality decent and injectors clear - a fuel-system cleaner every service interval is cheap insurance.
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 YZ250X runs KYB® Speed-Sensitive System inverted fork; fully adjustable and KYB® single shock; fully adjustable 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.
Low-speed handling
At just 103.9 kg, the YZ250X is light enough to manhandle easily at a standstill - one of the practical advantages of its class.
YZ250X - Buying & Maintenance Guide
What to check before buying
When inspecting a used 2020 Yamaha YZ250X, 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 YZ250X 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 YZ250X. 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.
Fuel system care
The YZ250X's fuel injection system is durable but benefits from quality fuel and the occasional use of a fuel-system cleaner additive. If the bike has been stored for more than three months, drain and replace the fuel to prevent varnish deposits in the injectors.
2020 Yamaha YZ250X - Frequently Asked Questions
What engine does the 2020 Yamaha YZ250X have?
The 2020 Yamaha YZ250X uses a Single cylinder, two-stroke engine with 249 cc of displacement.
How much does the 2020 Yamaha YZ250X weigh?
The 2020 Yamaha YZ250X weighs 103.9 kg. This is the manufacturer's wet figure.
What is the fuel tank capacity of the 2020 Yamaha YZ250X?
The 2020 Yamaha YZ250X has a 7.95-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 132-159 km between stops.
Is the 2020 Yamaha YZ250X suitable for shorter riders?
The 2020 Yamaha YZ250X has a seat height of 970 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 YZ250X have?
The 2020 Yamaha YZ250X uses Single disc. Hydraulic. at the front and Single disc. Hydraulic. at the rear.
What tyre sizes does the 2020 Yamaha YZ250X use?
The front tyre size on the 2020 Yamaha YZ250X is 90/90-21.
What fuel system does the 2020 Yamaha YZ250X use?
The 2020 Yamaha YZ250X uses Injection. Keihin® PWK38S, providing precise fuelling across the rev range and reliable cold-start behaviour.
Yamaha YZ250X Spec Evolution
The Yamaha YZ250X was produced across 8 model years (2016-2023). 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 |
2016 |
2017 |
2018 |
2019 |
2020 |
2021 |
2022 |
2023 |
| Wet Weight |
103.9 kg / 229.0 lbs |
103.9 kg / 229.0 lbs |
229.0 kg / 504.9 lbs |
103.9 kg / 229.0 lbs |
103.9 kg / 229.0 lbs |
103.9 kg / 229.0 lbs |
103.9 kg / 229.0 lbs |
103.9 kg / 229.0 lbs |
| Seat Height |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
970 mm / 38.2 in. |
975 mm / 38.4 in. |
| Fuel Capacity |
7.57 litres / 2.00 gallons |
7.57 litres / 2.00 gallons |
7.57 litres / 2.00 gallons |
7.95 litres / 2.10 US gallons |
7.95 litres / 2.10 US gallons |
7.95 litres / 2.10 US gallons |
7.95 litres / 2.10 US gallons |
6.81 litres / 1.80 US gallons |
| Ground Clearance (mm) |
325 mm |
325 mm |
325 mm |
361 mm |
361 mm |
361 mm |
361 mm |
361 mm |
| Ground Clearance (in.) |
12.8 inches |
12.8 inches |
12.8 inches |
14.2 inches |
14.2 inches |
14.2 inches |
14.2 inches |
14.2 inches |
| Bore x Stroke (mm) |
66.4 x 72.0 mm |
66.4 x 72.0 mm |
66.4 x 72.0 mm |
66.4 x 72.0 mm |
66.0 x 72.0 mm |
66.4 x 72.0 mm |
66.4 x 72.0 mm |
66.4 x 72.0 mm |
| Brakes - Front Diameter (mm) |
250 mm |
270 mm |
270 mm |
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- |
- |
- |
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| Brakes - Front Diameter (in.) |
9.8 inches |
10.6 inches |
10.6 inches |
- |
- |
- |
- |
- |
Key Specifications
Engine
Single cylinder, two-stroke
Power
Not published by manufacturer
Torque
Not published by manufacturer
Top Speed
Not published by manufacturer
Weight
103.9 kg / 229.0 lbs
Fuel Capacity
7.95 litres / 2.10 US gallons
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Full 2020 Yamaha YZ250X Specifications
Colours
Team Yamaha Blue
Warranty
30 Day Limited Factory Warranty
Ground Clearance (in.)
14.2 inches
Ground Clearance (mm)
361 mm
Seat Height
970 mm / 38.2 in.
Wheelbase
1486 mm / 58.5 in.
Height
1290 mm / 50.8 in.
Length
2184 mm / 86.0 in.
Width
826 mm / 32.5 in.
Fuel Capacity
7.95 litres / 2.10 US gallons
Wet Weight
103.9 kg / 229.0 lbs
Bore x Stroke (in,)
2.6 x 2.8 inches
Bore x Stroke (mm)
66.0 x 72.0 mm
Displacement (cc)
249.0 cc
Displacement (ci)
15.19 cubic inches
Engine Type
Single cylinder, two-stroke
Engine Detail
Reed-valve inducted
Fuel System
Injection. Keihin® PWK38S
Compression Ratio
9.4:1
Ignition
CDI
Starter
Electric
Clutch
Wet multi-disc
Final Drive
Chain (final drive)
Gearbox
5-speed
Primary Drive
O-ring chain
Suspension - Front
KYB® Speed-Sensitive System inverted fork; fully adjustable
Suspension - Rear
KYB® single shock; fully adjustable
Rake
27.7°
Trail
122 mm / 4.8 in.
Wheel Travel - Front
300 mm / 11.8 in.
Wheel Travel - Rear
315 mm / 12.4 in.
Brakes - Front
Single disc. Hydraulic.
Brakes - Rear
Single disc. Hydraulic.
Rims
Dunlop® AT81F tyres
Tyres - Front
90/90-21
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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