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2009 Buell 1125R Overview
The 2009 Buell 1125R is a sport motorcycle built around 1125 cc of displacement. Under the tank sits a Four stroke, 72° V-Twin engine, a compression ratio of 12.3:1. 2009 Buell 1125R delivers 109 kW @ 9800 rpm of peak power and 111 Nm of torque. The factory-quoted top speed stands at 243 km/h, making it a capable performer in its class. From a practical standpoint, the 2009 1125R tips the scales at 170 kg, carries a 21.2 L fuel tank, offers a seat height of 775 mm and spans a 1384 mm wheelbase. Scroll down for the complete 2009 Buell 1125R spec sheet covering every technical detail from suspension travel to tyre sizes.
2009 Buell 1125R compared with other bikes in the Sport category
Here is how the 2009 Buell 1125R stacks up against other bikes in the Sport category in our database. Each model counts once, using the model year closest to this one, and the comparison covers up to 2003 models.
- Engine displacement of 1125 cc is larger than that of 1786 of the other 2002 bikes in the Sport category.
- Only 219 of the other 1606 bikes in the Sport category have a lower seat height than the 775 mm of the 1125R.
- With 109 kW, the 1125R has the joint 298th highest power output of 1341 bikes in the Sport category, 45% above the category average of 75.2 kW.
- Narrowing the field to the 680 models within five model years of it, the engine displacement of 1125 cc is larger than that of 532 of the other 679.
Versus the 2008 model
The figures we track are unchanged from the 2008 model: peak power, peak torque, displacement, seat height and top speed all match.
2009 1125R - Pros & Cons
Strengths
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⚡
Strong power output: 2009 Buell 1125R makes 109 kW @ 9800 rpm with 111 Nm of torque - competitive figures for its class.
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⛽
Large fuel range: The 21.2 L tank is generously sized, translating to extended range between stops - ideal for touring or longer commutes.
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Low-maintenance final drive: Belt final drive means no chain to clean, lube or adjust - meaningfully less routine maintenance than a chain-driven equivalent.
Considerations
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ℹ️
Age-related wear: As with any used 1125R, a thorough pre-purchase inspection covering consumables, service history and tyres is always recommended.
Wear Points & Servicing Notes
Cooling system servicing
The Liquid cooled system on the 1125R needs a coolant change roughly every two years (or per the service schedule) - skipping it lets the coolant turn acidic and corrode the aluminium water passages over time.
Suspension condition on used examples
Up front, the 1125R runs ø47 mm Showa inverted forks, adjustable compression damping. rebound damping and spring preload and 127 mm 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 belt - lower maintenance than chain with no lubrication needed, but tension and tooth wear should still be checked at service intervals.
Frame & chassis check
The frame is Aluminium frame with fuel in frame. - worth a visual check for corrosion or impact damage around the head-stock and swingarm pivot on any used example, since frame damage is far costlier to fix than any service item.
1125R - Buying & Maintenance Guide
What to check before buying
When inspecting a used 2009 Buell 1125R with its 1125 cc sport, start with the basics: check the service book for oil change frequency, inspect the drivetrain for wear, and look for oil seepage around the engine casings and rocker covers. This model runs belt final drive, so check belt tension and tooth wear - a cracked or glazed belt is a clear sign of neglect. Now 17 years old, this sport is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. A cold start test is invaluable - a well-maintained 1125R 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 for the 1125R's 1125 cc four stroke, 72° v-twin. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. With a 12.3:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Always use the correct viscosity grade as specified in the owner's manual.
Fuel system care
The 1125R'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.
2009 Buell 1125R - Frequently Asked Questions
What engine does the 2009 Buell 1125R have?
The 2009 Buell 1125R uses a Four stroke, 72° V-Twin engine with 1125 cc of displacement. It is liquid cooled.
What is the top speed of the 2009 Buell 1125R?
The 2009 Buell 1125R has a factory-quoted top speed of 243 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.
How much does the 2009 Buell 1125R weigh?
The 2009 Buell 1125R weighs 170 kg. This is the manufacturer's dry figure.
How much power does the 2009 Buell 1125R make?
The 2009 Buell 1125R produces 109 kW @ 9800 rpm of power and 111 Nm of torque. These are peak figures.
What is the fuel tank capacity of the 2009 Buell 1125R?
The 2009 Buell 1125R has a 21.2 L fuel tank. At around 5-6 litres per 100 km, that is roughly 353-423 km between stops.
Is the 2009 Buell 1125R suitable for shorter riders?
The 2009 Buell 1125R has a seat height of 775 mm. This is a moderate seat height that suits a wide range of rider heights.
What brakes does the 2009 Buell 1125R have?
The 2009 Buell 1125R uses ZTL type brake, 6-piston, fixed caliper, Ø375 mm single-sided, inside out, stainless steel, floating rotor at the front and single Ø240 mm disc, 2 piston floating caliper at the rear.
What tyre sizes does the 2009 Buell 1125R use?
The 2009 Buell 1125R runs 120/70 ZR17, Pirelli Diablo Corsa III front and 180/55 ZR17, Pirelli Diablo Corsa III rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2009 Buell 1125R have?
The 2009 Buell 1125R is fitted with a 6 Speed transmission.
Buell 1125R Spec Evolution
The Buell 1125R was produced across 3 model years (2008-2010). 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 |
2008 |
2009 |
2010 |
| Suspension - Front |
ø47 mm Showa inverted forks, adjustable compression damping. rebound damping and spring preload. 120mm wheel travel. |
ø47 mm Showa inverted forks, adjustable compression damping. rebound damping and spring preload. |
ø47 mm Showa inverted forks, adjustable compression damping. rebound damping and spring preload. |
| Fuel Induction |
Dual Ø61 mm downdraft throttle bodies, DDFI III Fuel Injection System |
Dual Ø61 mm downdraft throttle Bbodies, DDFI III Fuel Injection System |
Dual Ø61 mm downdraft throttle Bbodies, DDFI III Fuel Injection System |
Key Specifications
Engine
Four stroke, 72° V-Twin
Power
109 kW / 146 hp @ 9800 rpm
Torque
111 Nm / 11.3 kgf-m / 81.9 ft.lbs@ 9000 rpm
Top Speed
243 km/h / 151 mph
Fuel Capacity
21.2 L / 5.6 US gal
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Full 2009 Buell 1125R Specifications
Year
2009
Model
1125R
Make Model
Buell 1125R
Seat Height
775 mm / 30.5"
Wheelbase
1384 mm / 54.5"
Ground Clearance
114 mm / 4.5"
Length
1996 mm / 78.6"
Width
716 mm / 28.2"
Dry Weight
170 kg / 375 lbs
Fuel Capacity
21.2 L / 5.6 US gal
Displacement
1125 cc / 68.7 cu in
Engine Detail
Four stroke, 72° V-Twin
Bore x Stroke
103 x 67.5 mm
Compression Ratio
12.3:1
Cooling System
Liquid cooled
Fuel Induction
Dual Ø61 mm downdraft throttle Bbodies, DDFI III Fuel Injection System
Starter
Electric
Final Drive
Belt
Gear Ratios
1st 2.462 / 2nd 1.750 / 3rd / 1.381 / 4th 1.174 / 5th 1.042 / 6th 1.00
Transmission / Drive
6 Speed
Frame Type
Aluminium frame with fuel in frame.
Suspension - Front
ø47 mm Showa inverted forks, adjustable compression damping. rebound damping and spring preload.
Suspension - Rear
127 mm / 5.0" | Showa® coil over monoshock, adjustable compression damping. rebound damping and spring preload.
Rake
21°
Trail
83.8 mm / 3.3"
Wheel Travel - Front
120 mm / 4.7"
Brakes - Front
ZTL type brake, 6-piston, fixed caliper, Ø375 mm single-sided, inside out, stainless steel, floating rotor
Brakes - Rear
Single Ø240 mm disc, 2 piston floating caliper
Tyres - Front
120/70 ZR17, Pirelli Diablo Corsa III
Tyres - Rear
180/55 ZR17, Pirelli Diablo Corsa III
Wheels
6-Spoke ZTL2 cast aluminium
Wheels - Front
3.50 x 17"
Wheels - Rear
5.50 x 17"
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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