2011 Yamaha YZ450F Specifications

Name: 2011 Yamaha YZ450F
Brand: Yamaha

Cross / motocross • Specs last verified 13 July 2026

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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. That's roughly 12.5 kg heavier than the average cross / motocross motorcycle in our database. 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 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.
Modest fuel capacity: The 6.17-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

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.

Valve clearance checks

DOHC valve actuation on the YZ450F means clearances should be checked at the manufacturer's specified interval - they can tighten as mileage accumulates, and a light top-end tick is usually the first sign.

Brake disc and pad wear

The Single disc 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 YZ450F runs KYB Speed-Sensitive System, inverted fork: fully adjustable, 12.2-in travel and KYB Fully adjustable 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.

Low-speed handling

At just 111.1 kg, the YZ450F is light enough to manhandle easily at a standstill - one of the practical advantages of its class.

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. A bike with clearances out of spec doesn't always feel obviously wrong - but tight clearances accelerate valve seat wear. Ask for service documentation proving it's 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. At around 5-6 litres per 100 km, that is roughly 102-123 km between stops.

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

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

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)

Ground Clearance (mm) 381 mm

Ground Clearance (in.) 15.0 inches

Seat Height 998 mm / 39.3 in.

Wheelbase 1,491 mm / 58.7 in.

Height 1,311 mm / 51.6 in.

Length 2,192 mm / 86.3 in.

Width 823 mm / 32.4 in.

Oil Capacity (Quarts) 0.08 quarts

Oil Capacity (l) 1.20 litres

Fuel Capacity 6.17 litres / 1.63 gallons

Wet Weight 111.1 kg / 245.0 lbs

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

Final Drive Chain

Gearbox 5-speed

Primary Drive 2WD; Sealed O-Ring Chain, Eccentric Adjustment

Suspension - Front KYB Speed-Sensitive System, inverted fork: fully adjustable, 12.2-in travel

Suspension - Rear KYB Fully adjustable single shock

Wheel Travel - Rear 315 mm / 12.4 in.

Lighting system Dual 30W Krypton multireflector Headlights and 3.9/0.5W LED Brake light

Brakes - Rear Diameter (mm) 245 mm

Brakes - Rear Diameter (in.) 9.6 inches

Brakes - Front Diameter (mm) 250 mm

Brakes - Front Diameter (in.) 9.8 inches

Brakes - Front Single disc

Brakes - Rear Single disc

Tyres - Front 80/100-21

Tyres - Rear 120/80-19

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