| Buell 1125R | |
| Manufacturer: | Buell |
| Production: | 2008 - 2009 by Buell 2009 - by Erik Buell Racing |
| Class: | Sport bike |
| Engine: | Rotax Helicon: liquid-cooled, 72° V-twin, 1124.9cc, DOHC, FI, 4 valves per cylinder, finger followers, shims, dual 61mm downdraft throttle bodies, ram-air intake, dry-sump lubrication |
| Compression: | 12.3:1 |
| Bore Stroke: | 103× |
| Power: | 146hp (claimed) 127.1hp134hp @ 9,800 rpm(rear wheel) |
| Torque: | 71.1lbfft75.9lbfft @ 8,300 rpm(rear wheel) |
| Top Speed: | 158mph161mph |
| Transmission: | 6-speed, belt drive, HVA slipper clutch |
| Suspension: | Front: Fully adjustable 47 mm Showa inverted fork, 120mm suspension travel Rear: Fully adjustable Showa coil over monoshock, 127mm suspension travel |
| Brakes: | Front: ZTL2 8-piston rim-mounted 375mm single disc Rear: 2-piston caliper,240mm disc |
| Tires: | Pirelli Diablo Corsa III Front: 120/70 ZR-17 @ 3.5inches×17inchesin (×in) cast aluminium wheel Rear: 180/55 ZR-17 @ 5.5inchesx17inchesin (xin) cast aluminium wheel |
| Rake Trail: | 21.0° / 84mm |
| Wheelbase: | 1375mm |
| Length: | 2040mm |
| Width: | 716mm |
| Seat Height: | 30.50NaN0 |
| Dry Weight: | 375lb[1] |
| Wet Weight: | 466lb |
| Fuel Capacity: | 5.6gal[2] |
| Fuel Consumption: | 32.6mpgus36mpgus |
| Related: | Buell Firebolt XB12R, Buell 1125CR |
The Buell 1125R is a sport bike that was made by Buell Motorcycle Company in the United States. It was introduced in July 2007 for the 2008 model year. Production of road-going 1125Rs, and all Buell models, ceased in October 2009. In November 2009, Buell founder Erik Buell launched Erik Buell Racing, which initially produced race-only versions of the 1125R.[3]
The 1125R is powered by a 1125cc Helicon V-twin engine made by BRP-Powertrain (Rotax) of Austria. The liquid-cooled engine has a V angle of 72° and produces a claimed 1460NaN0, with a rpm limit of 10,500.[4] Motorcycle Consumer News tested 127.1hp and 71.1lbfft at the rear wheel, while Cycle World reported 134hp @ 9,800 rpm and 75.9lbfft} @ 8,300 rpm. The two magazines reported top speeds of 158mph161mph respectively, and 0to times of 10.51 and 10.39 seconds at 134.32mph134.09mph.
The Helicon engine's 72° layout differs from Buell's previous V-twins, which were based on 45° air-cooled Harley-Davidson Sportster motors, modified for greater efficiency and output.
The 1125R includes a number of unconventional design attributes. The patented frame design houses the bike's fuel. The single, eight-piston front brake, called ZTL2, has a 375mm inverted rotor that is directly attached to the front wheel rim. This enabled Buell to design a front end that was lighter and more responsive than traditional designs. The bike also uses an exhaust under the engine for greater volume. The frame, front end and exhaust all contribute to Buell's main design aim of mass centralization. Instead of a drive chain the 1125R uses a drive belt, which does not require lubrication or adjustment.