The 2010 Buell 1125RR American Superbike

The RR model has a modified Helicon 1125cc V-Twin engine, and according to the Wisconsin based company has a significant power increase from the 1125R which includes a larger airbox and intake manifold, revised valves and camshafts, a higher compression ratio, titanium exhaust system and other weight-reduced components. The bike is fitted with race-spec Showa suspension, a cast-aluminum swingarm with billet axle adjusters and eight-piston Nissin front calipers

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The Buell 1125RR American Superbike

The 1125RR motorcycle is designed to give privateer racers a turn-key machine to compete in the American Superbike class in AMA Pro Racing,” said Buell, the Chairman and Chief Technical Officer of Buell Motorcycle Company.

“We want to build on our program that has proven so successful for privateers in the Daytona SportBike class.

The Buell 1125RR uses some race components already used on 1125R that has taken victories in the Daytona SportBike class, such as a billet axle-adjustment system for the aluminum swingarm that incorporates chain drive for simpler gearing changes.

In the axle’s center position, the double-R has a 55.5-inch wheelbase, up nearly an inch from the streetbike’s 54.6 inches. The chassis itself is unchanged from the standard 1125R’s twin-beam aluminum frame that doubles as the bike’s fuel tank.

The 1125RR chassis is the standard 1125R design with fuel-in-the-frame, plus a billet axle adjustment system and chain-drive to allow gearing changes. Suspension travel is managed by fully adjustable units, with a Showa 43mm front fork and a remote-reservoir rear shock. A ZTL2 (Zero Torsional Load) eight-piston front caliper is mated with a modified front rotor.

Suspension is from Showa, like the 1125R streetbike, but the 1125RR gets Showa’s new Big Piston Fork with race-kit internals and an upgraded remote-reservoir race shock. Braking is via Buell’s ZTL2 (Zero Torsional Load) system that uses a single perimeter-mounted rotor (modified for race use) and the massive eight-piston front caliper. The use of lightweight magnesium wheels improves suspension performance and handling but adds a big chunk o’ change to the RR’s spendy $39,995 list price.

Orders must be placed through the Buell Race Department and delivered through an authorized Buell motorcycle dealer. For more info and a complete specs list check out www.buell.com

Even though this looks like a regular 1125R, it’s actually the race-spec 1125RR, which isn’t street-legal, costs $40,000 and will only be sold to AMA racers!

Racing the Buell 1125RR

Buell 1125RR features:

  • 1125cc (68.7 cid) Helicon Powertrain
  • 4.055 inch (103 mm) bore and 2.658 inch (67.5mm) stroke
  • Dual 61mm down-draft fuel-injection throttle bodies
  • Titanium exhaust header and mass-centralized muffler
  • 6-Spoke cast magnesium racing wheels
  • Front: 3.5 inch (88.9mm) x 17 inch (431.8mm)
  • Rear: 6 inch (152.4mm) x 17 inch (431.8mm)
  • Buell ZTL2 reversed rotor front brake with eight-piston Nissin caliper
  • 43mm Showa fully-adjustable inverted forks
  • Showa fully-adjustable rear shock with remote reservoir
  • Cast-aluminum swingarm machined with billet axle adjustment system
  • Center position wheelbase 55.5 inches (1410 mm)


“The 1125RR is designed to give privateer racers a turn-key machine to compete in the American Superbike class in AMA Pro Racing. We want to build on our program that has proven so successful for privateers in the Daytona SportBike class,”
said Erik Buell, Chairman and Chief Technical Officer, Buell Motorcycle Company.

However, the American manufacturer will produce a limited number of 2010 Buell 1125RR available for purchasing only by licensed professional road racers who will compete in the AMA Pro Racing American Superbike class, at an US MSRP of $39,995.

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