2011 Yamaha YZ450F Specifications

Name: 2011 Yamaha YZ450F
Brand: Yamaha

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2011 Yamaha YZ450F Overview

The 2011 Yamaha YZ450F is a cross / motocross motorcycle built around 449 cc of displacement. Under the tank sits a Single cylinder, four-stroke engine running DOHC valve actuation, a compression ratio of 12.5:1. The bore and stroke measures 97 x 60.8 mm. From a practical standpoint, the 2011 YZ450F tips the scales at 111.1 kg, carries a 6.17-litre fuel tank, offers a seat height of 998 mm and spans a 1,491 mm wheelbase. Scroll down for the complete 2011 Yamaha YZ450F spec sheet covering every technical detail from suspension travel to tyre sizes.

2011 YZ450F - Pros & Cons

Strengths

Fuel injection: The fuel injection injection system delivers crisp throttle response and reliable cold starts regardless of altitude or temperature.

Considerations

Tall seat height: The 998 mm seat height will challenge shorter riders - tiptoeing at low speeds is something to factor into your decision.

Owner Experiences & Common Issues

Throttle response and fuelling

The fuel injection on the 2011 Yamaha YZ450F is generally well-regarded. Some owners note a slight hesitation at small throttle openings when cold, which clears once the engine reaches operating temperature. A quick visual check of the injector connectors during routine servicing is good practice on higher-mileage examples.

Valve clearance checks

DOHC engines should have valve clearances checked at the manufacturer's specified interval. Owners report that clearances can tighten over time on higher-mileage bikes, leading to slight ticking from the top end. Catching it early keeps the job simple and avoids more costly remediation.

YZ450F - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2011 Yamaha YZ450F, 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 YZ450F 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 YZ450F. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. The sump holds 1.20 litres, so budget for that volume of quality motorcycle-specific engine oil. Always use the correct viscosity grade as specified in the owner's manual.

Fuel system care

The YZ450F'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.

Valve clearance service

Check that valve clearances have been adjusted at the correct intervals on any used YZ450F. This is a job many owners skip because the bike does not immediately feel wrong - but tight clearances accelerate valve seat wear. Ask for proof it has been done.

2011 Yamaha YZ450F - Frequently Asked Questions

What engine does the 2011 Yamaha YZ450F have?

The 2011 Yamaha YZ450F uses a Single cylinder, four-stroke engine with 449 cc of displacement.

How much does the 2011 Yamaha YZ450F weigh?

The 2011 Yamaha YZ450F weighs 111.1 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 2011 Yamaha YZ450F?

The 2011 Yamaha YZ450F has a 6.17-litre fuel tank.

Is the 2011 Yamaha YZ450F suitable for shorter riders?

The 2011 Yamaha YZ450F has a seat height of 998 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 2011 Yamaha YZ450F have?

The 2011 Yamaha YZ450F uses Single disc at the front and Single disc at the rear.

What tyre sizes does the 2011 Yamaha YZ450F use?

The 2011 Yamaha YZ450F runs 80/100-21 front and 120/80-19 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

How much oil does the 2011 Yamaha YZ450F take?

The 2011 Yamaha YZ450F takes 1.20 litres of engine oil at a full oil and filter change. Always verify against the dipstick or sight glass after filling.

Yamaha YZ450F Spec Evolution

The Yamaha YZ450F was produced across 20 model years (2004-2023). 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	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Wet Weight	-	-	-	-	-	108.0 kg / 238.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	111.1 kg / 245.0 lbs	108.9 kg / 240.0 lbs
Dry Weight	97 kg / 213.8 lbs	-	99.8 kg / 220.0 lbs	99.8 kg / 220.0 lbs	99.3 kg / 219.0 lbs	-	-	-	-	210.5 kg / 464.1 lbs	59 kg / 130.1 lbs	-	-	-	-	-	-	-	-	-
Engine Detail	-	-	-	-	-	-	-	Titanium valves	Titanium valves	-	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves	Titanium-valves
Engine Type	Single cylinder	Single cylinder, four-stroke	V2, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke	Single cylinder, four-stroke
Seat Height	995 mm / 39.2 in.	996 mm / 39.2 in.	998 mm / 39.3 in.	988 mm / 38.9 in.	988 mm / 38.9 in.	988 mm / 38.9 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	1,001 mm / 39.4 in.	1,001 mm / 39.4 in.	1,001 mm / 39.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	965 mm / 38.0 in.	965 mm / 38.0 in.	965 mm / 38.0 in.	965 mm / 38.0 in.
Fuel Capacity	-	6.81 litres / 1.80 gallons	7.00 litres / 1.85 gallons	6.81 litres / 1.80 gallons	6.81 litres / 1.80 gallons	6.81 litres / 1.80 gallons	6.05 litres / 1.60 gallons	6.17 litres / 1.63 gallons	6.06 litres / 1.60 gallons	6.06 litres / 1.60 gallons	6.06 litres / 1.60 gallons	7.57 litres / 2.00 gallons	7.57 litres / 2.00 gallons	7.57 litres / 2.00 gallons	7.57 litres / 2.00 gallons	6.06 litres / 1.60 US gallons	6.06 litres / 1.60 US gallons	6.06 litres / 1.60 US gallons	6.06 litres / 1.60 US gallons	6.06 litres / 1.60 US gallons
Oil Capacity (Quarts)	-	-	-	-	-	-	-	0.08 quarts	-	-	-	-	-	-	-	-	-	-	1.06 US quarts	1.06 US quarts
Oil Capacity (l)	-	-	-	-	-	-	-	1.20 litres	-	-	-	-	-	-	-	-	-	-	1.00 litres	1.00 litres

Key Specifications

Engine

Single cylinder, four-stroke

Power

N/A

Torque

N/A

Top Speed

N/A

Weight

111.1 kg / 245.0 lbs

Fuel Capacity

6.17 litres / 1.63 gallons

Full 2011 Yamaha YZ450F Specifications

Colours White/Red, Team Yamaha Blue/White)

Warranty 30 Day (Limited Factory Warranty)

Mods from previous model New clutch lever and pushrod for more consistent clutch feel during long motos.

Fuel Control DOHC

Bore x Stroke (in,) 3.8 x 2.4 inches

Bore x Stroke (mm) 97.0 x 60.8 mm

Engine Type Single cylinder, four-stroke

Displacement (ci) 27.40 cubic inches

Displacement (cc) 449.00 cc

Engine Detail Titanium valves

Fuel System Injection. Yamaha Fuel Injection (YFI), Keihin 44mm

Compression Ratio 12.5:1

Engine Lubrication Dry sump

Ignition CDI

Starter Electric

Valve System 4

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2022 2011

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