Sun Coast Cycle Sports carries used OEM parts for the 2008-2010 Buell 1125R and 1125CR, the liquid-cooled sport bikes that represented Buell's break from Harley-Davidson Sportster engine technology. Powered by a 1,125cc 72-degree DOHC V-twin designed in collaboration with BRP-Rotax of Austria and branded "Helicon," the 1125 produced approximately 146 horsepower and was the most powerful production Buell ever built. The 1125R was a sportbike with a small nose fairing, while the 1125CR adopted cafe racer styling with a more upright riding position. Parts are inspected, individually cataloged, and ship from our Odessa, Florida warehouse.
Buell 1125 generation and parts compatibility
| Model | Years | Engine | Key notes |
|---|
| 1125R | 2008-2010 | 1,125cc Rotax Helicon 72-degree DOHC V-twin, ~146 hp | Sportbike with nose fairing, liquid cooled |
| 1125CR | 2009-2010 | 1,125cc Rotax Helicon, ~146 hp | Cafe racer variant, longer wheelbase, more upright position |
The 1125R and 1125CR share the same Rotax Helicon engine, aluminum perimeter frame, and most running gear. The CR has a longer swingarm for increased wheelbase stability, different handlebars for a more upright riding position, and cafe racer styling. All engine, frame, brake, and electrical components interchange between the 1125R and 1125CR except for the model-specific bodywork, swingarm length, and handlebars.
The 1125's Rotax Helicon engine shares NO components with the Sportster-derived engines used in XB and tube-frame Buells. It is also distinct from the later EBR 1190 engine, which was Erik Buell Racing's own design. The 1125 is a standalone platform within the Buell lineup.
Common 1125 failure points and replacement parts
Fuel pump relay: The fuel pump relay can fail, causing no-start conditions. This is a documented issue with a straightforward relay replacement fix.
Coolant system maintenance: As Buell's first liquid-cooled motorcycle, the 1125 requires coolant system maintenance that was not part of the air-cooled Buell ownership experience. Water pump seal leaks and thermostat failures have been reported on higher-mileage examples.
Clutch slave cylinder: Some owners report clutch slave cylinder issues causing inconsistent clutch engagement. Aftermarket slave cylinders are available.
Limited parts availability: With only approximately three years of production before Buell's closure, the 1125 has a small total production volume. Parts sourcing can be challenging, though the Rotax engine shares some components with other Rotax-powered motorcycles from other manufacturers.
Commonly replaced 1125 parts
- Fuel pump relay and fuel system components
- Coolant system (water pump, thermostat, hoses)
- Clutch slave cylinder
- Brake pads and ZTL perimeter rotor
- Bodywork and fairing panels
- Exhaust system
- Radiator and cooling fan
- Battery and electrical components
Frequently asked questions
Q: Does the 1125 share parts with XB9 or XB12 models
No engine or frame components interchange. The 1125 uses a completely different liquid-cooled Rotax engine and aluminum perimeter frame. Some generic components like brake pad compounds, switch housings, or fasteners may be common, but the 1125 is functionally a separate platform from all other Buell models. Some ZTL brake components may cross over.
Q: Is the 1125 engine related to the EBR 1190 engine
No. The 1125 uses the Rotax-designed Helicon engine, while the EBR 1190 uses an engine designed and manufactured by Erik Buell Racing. Despite both being liquid-cooled V-twins, they are different engines with no shared internal components.
Q: Are 1125R and 1125CR parts interchangeable
Yes, for engine, frame, brakes, and most mechanical components. The CR uses a longer swingarm, different handlebars, and cafe racer bodywork, so these specific components are model-specific. All engine internals, the ZTL brake system, wheels, electrical systems, and most chassis hardware interchange directly between the R and CR.
Inspected by Powersports Technicians • Only One in Stock • Ships Fast from Florida
