| Attribute | Specification |
|---|---|
| Model Code | 0145 |
| Production Years | 2008 – 2011 |
| Engine Oil | SAE 5W-40 (JASO MA) (1.0 L) |
| Tires (Front) | 90/90 – 21 M/C 54R |
| Tires (Rear) | 140/80 – 18 M/C 70R |
| Tire Pressure | F: 1.5 bar (21.8 psi) / R: 1.5 bar (21.8 psi) |
| Battery | YTZ7S |
| Spark Plug | NGK CR9EKB |
The Coaxial Revolution: Engineering Highlight
The BMW G 450 X remains a landmark in enduro engineering due to its radical coaxial swingarm pivot. Unlike traditional designs where the drive sprocket and swingarm pivot are separate, BMW aligned them on the same axis. This innovation eliminated chain tension changes during suspension travel, allowing for a longer swingarm without increasing the wheelbase, thereby significantly enhancing traction and stability in extreme off-road conditions.
Technical Analysis: Engine and Chassis
The heart of the 0145 model is a high-revving, single-cylinder DOHC engine. To achieve its compact dimensions, the cylinder was tilted forward by 30 degrees, providing space for a straight intake tract located directly above the engine. This design optimized airflow and lowered the center of gravity. The stainless steel frame was designed for maximum rigidity with minimal weight, weighing in at just 8.6 kg.
Maintenance Protocol
For the professional technician or the dedicated owner, adherence to the following service parameters is critical for the longevity of the G 450 X:
- Lubrication: Use only high-quality SAE 5W-40 (JASO MA) oil. The system capacity is a precise 1.0 liter. Given the high-performance nature of this engine, frequent oil changes are recommended after every 10-20 hours of hard off-road use.
- Ignition: The NGK CR9EKB dual-electrode plug is specified to ensure reliable ignition under high thermal loads.
- Electrical: The YTZ7S battery provides the necessary cold cranking amps while maintaining a lightweight profile.
Tire and Suspension Setup
To maintain the handling characteristics intended by BMW Motorrad, the tire pressures should be set to 1.5 bar (21.8 psi) for both front and rear. This pressure provides a balanced footprint for mixed enduro terrain. The 21-inch front and 18-inch rear wheel combination is the industry standard for competitive off-road performance, allowing for a wide range of tire compound selections.
Expert Verdict
The BMW G 450 X (0145) is a specialist machine that requires meticulous maintenance. Its unique design offers advantages in traction that few modern bikes can replicate, but its unconventional layout demands a technician who understands its specific architectural nuances.