| Manufacturer | Buell |
|---|---|
| Production | 2008–2009 by Buell 2009– by Erik Buell Racing |
| Class | Sport bike |
| Engine | Rotax Helicon: liquid-cooled 72° V-twin, 1,124.9 cc (68.65 cu in), DOHC, 4 valves per cylinder, Finger followers, shims, DDFI III fuel injection, 6-hole-injectors, Dual 61 mm (2.4 in) down draft throttle bodies, pressurized RAM Air intake, dry-sump lubrication |
| Bore / Stroke | 103.0 × 67.5 mm (4.06 × 2.66 in) |
| Compression ratio | 12.3:1 |
| Power | 146 hp (109 kW) @ 9,800 rpm |
| Torque | 82 ft·lbf (111 N·m) @ 8,000 rpm |
| Transmission | 6-speed, Belt drive, HVA Slipper clutch |
| Suspension | front: Fully adjustable 47 mm Showa inverted fork, 120 mm (4.7 in) suspension travel rear: Fully adjustable Showa coil over monoshock, 127 mm (5.0 in) suspension travel |
| Brakes | Front: ZTL2 8-piston rim-mounted 375 mm (14.8 in) single disc Rear: 2-piston caliper,240 mm (9.4 in) disc |
| Tires | OEM: Pirelli Diablo Corsa III Front: 120/70 ZR-17 @ 3.50 x 17 in cast aluminium wheel Rear: 180/55 ZR-17 @ 5.50 x 17 in cast aluminium wheel |
| Rake, Trail | 21.0° / 84 mm (3.3 in) |
| Wheelbase | 1,375 mm (54.1 in) |
| Dimensions | L 2,040 mm (80 in) W 716 mm (28.2 in) |
| Seat height | 30.5 in (775 mm) |
| Weight | 375 lb (170 kg) (dry) 456 lb (207 kg) (wet) |
| Fuel capacity | 20.1 l (4.4 imp gal; 5.3 US gal) |
| Related | Buell Firebolt XB12R, Buell 1125CR |
The Buell 1125R is a sport bike that was manufactured by Buell Motorcycle Company in the United States. It was introduced in July 2007 for the 2008 model year. Production of road-going models ceased in October 2009, when Erik Buell announced the cessation of production for the entire Buell range. In November 2009, Buell founder Erik Buell launched Erik Buell Racing, which produce race-only versions of the 1125R.[1]
It is powered by a 1,125 cc (68.7 cu in) Helicon V-twin engine produced by BRP-Powertrain (Rotax) of Austria. This liquid-cooled engine has a V angle of 72° and produces a reported 146 hp (109 kW), with a maximum rpm limit of 10,500.[2]
The 72° included angle in this engine is a change from previous V-twins from this manufacturer which are 90° (Ducati, Suzuki, Aprilia) or 60° (Aprilia, Can-Am), or 45° (Harley-Davidson Evolution engine). Voxan was also using 72° V-twins.
The 1125R includes a number of unique design attributes. The patented frame design houses the bike's fuel. The single, eight-piston front brake, called ZTL2, features a 375 mm (14.8 in), inverted rotor that is directly attached to the bike's front rim. This feature allowed Buell to design a lighter, more responsive front end than traditional designs. The bike also utilizes an exhaust under the engine for greater volume. The frame, front end and exhaust all contribute to Buell's main design theme of mass centralization. The 1125R uses a drive belt instead of a chain, which does not require lubrication or adjustment.