2005 Yamaha YZ250 Specifications

Name: 2005 Yamaha YZ250
Brand: Yamaha

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2005 Yamaha YZ250 Overview

The 2005 Yamaha YZ250 is a cross / motocross motorcycle built around 249 cc of displacement. Under the tank sits a Single cylinder engine, a compression ratio of 9.1:1. The bore and stroke measures 66.4 x 72 mm. From a practical standpoint, the 2005 YZ250 carries a 7.94-litre fuel tank and offers a seat height of 991 mm. Scroll down for the complete 2005 Yamaha YZ250 spec sheet covering every technical detail from suspension travel to tyre sizes.

2005 YZ250 - Pros & Cons

Strengths

Factory engineering: The 2005 Yamaha YZ250 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 991 mm seat height will challenge shorter riders - tiptoeing at low speeds is something to factor into your decision.

Owner Experiences & Common Issues

Carburetor maintenance

Carburetors on the 2005 Yamaha YZ250 benefit from a clean and re-jet if the bike has been stored, run on stale fuel, or modified with an aftermarket exhaust. Owners frequently mention that fresh jets and float needle clips transforms throttle response from flat to crisp.

YZ250 - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2005 Yamaha YZ250, 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 YZ250 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 YZ250. 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 YZ250 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.

2005 Yamaha YZ250 - Frequently Asked Questions

What engine does the 2005 Yamaha YZ250 have?

The 2005 Yamaha YZ250 uses a Single cylinder engine with 249 cc of displacement.

How much does the 2005 Yamaha YZ250 weigh?

The 2005 Yamaha YZ250 weight is listed in the full spec table below.

What is the fuel tank capacity of the 2005 Yamaha YZ250?

The 2005 Yamaha YZ250 has a 7.94-litre fuel tank.

Is the 2005 Yamaha YZ250 suitable for shorter riders?

The 2005 Yamaha YZ250 has a seat height of 991 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 2005 Yamaha YZ250 have?

The 2005 Yamaha YZ250 uses Single disc at the front and Single disc at the rear.

What tyre sizes does the 2005 Yamaha YZ250 use?

The 2005 Yamaha YZ250 runs 80/80-21 front and 110/90-19 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What fuel system does the 2005 Yamaha YZ250 use?

The 2005 Yamaha YZ250 uses Carburettor, providing precise fuelling across the rev range and reliable cold-start behaviour.

Yamaha YZ250 Spec Evolution

The Yamaha YZ250 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	-	-	-	-	-	-	103.9 kg / 229.0 lbs	103.9 kg / 229.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.1 lbs	103.0 kg / 227.1 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs	103.0 kg / 227.0 lbs
Dry Weight	97.5 kg / 215.0 lbs	97 kg / 213.8 lbs	-	96 kg / 211.6 lbs	96 kg / 211.6 lbs	96.2 kg / 212.0 lbs	-	-	-	-	210.5 kg / 464.1 lbs	59 kg / 130.1 lbs	-	-	-	-	-	-	-	-	-
Engine Type	Single cylinder	Single cylinder	Single cylinder	V2	Single cylinder	Single cylinder	Single cylinder	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, four-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	-	990 mm / 39.0 in.	991 mm / 39.0 in.	997 mm / 39.3 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	993 mm / 39.1 in.	976 mm / 38.4 in.	976 mm / 38.4 in.	976 mm / 38.4 in.	976 mm / 38.4 in.	976 mm / 38.4 in.	970 mm / 38.2 in.	970 mm / 38.2 in.	975 mm / 38.4 in.
Fuel Capacity	-	-	7.94 litres / 2.10 gallons	8.00 litres / 2.11 gallons	7.94 litres / 2.10 gallons	7.94 litres / 2.10 gallons	7.94 litres / 2.10 gallons	7.94 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	8.00 litres / 2.11 gallons	8.00 litres / 2.11 gallons	8.00 litres / 2.11 gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons
Oil Capacity (Quarts)	-	-	-	-	-	-	-	-	-	-	-	-	-	0.05 quarts	0.05 quarts	0.05 quarts	0.85 US quarts	0.85 US quarts	0.85 US quarts	0.85 US quarts	0.85 US quarts
Ground Clearance (mm)	391 mm	391 mm	396 mm	385 mm	381 mm	381 mm	381 mm	381 mm	381 mm	381 mm	381 mm	381 mm	381 mm	367 mm	367 mm	367 mm	361 mm	361 mm	361 mm	361 mm	361 mm
Ground Clearance (in.)	15.4 inches	15.4 inches	15.6 inches	15.2 inches	15.0 inches	15.0 inches	15.0 inches	15.0 inches	15.0 inches	15.0 inches	15.0 inches	15.0 inches	15.0 inches	14.4 inches	14.4 inches	14.4 inches	14.2 inches	14.2 inches	14.2 inches	14.2 inches	14.2 inches

Key Specifications

Engine

Single cylinder

Power

N/A

Torque

N/A

Top Speed

N/A

Weight

N/A

Fuel Capacity

7.94 litres / 2.10 gallons

Full 2005 Yamaha YZ250 Specifications

Colours Team Yamaha Blue/White

Bore x Stroke (in,) 2.6 x 2.8 inches

Bore x Stroke (mm) 66.4 x 72.0 mm

Displacement (cc) 249.00 cc

Displacement (ci) 15.19 cubic inches

Engine Type Single cylinder

Stroke 2

Fuel System Carburettor

Compression Ratio 9.1:1

Valve System 1

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2005 Yamaha YZ250

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