K&N High Flow Air Filter for BMW R45 Motorcycle - Street
K&N High Flow Air Filter for BMW R45 Motorcycle - Street
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Description
K&N Powersports High-Flow Air Filter
Upgrade your machine’s performance with a K&N High-Flow Powersports Air Filter. Designed to increase airflow while providing superior filtration, these premium reusable filters help your engine breathe better for improved horsepower, throttle response, and overall performance.
Built with oiled cotton gauze media, K&N filters capture dirt and debris while allowing more air to reach the engine compared to traditional paper filters. The result is better performance and long-term reliability for motorcycles, ATVs, UTVs, and other powersports machines.
Unlike disposable filters, K&N air filters are washable and reusable, helping reduce maintenance costs over time. With proper cleaning and oiling, one filter can last for the life of your vehicle.
Key Features
High-flow design improves airflow and engine performance
Superior filtration protects your engine from dirt and debris
Washable and reusable for long-term value
Durable oiled cotton gauze construction
Direct OEM replacement for easy installation
Designed specifically for motorcycles, ATVs, UTVs, and other powersports applications
Why Choose K&N?
K&N is a global leader in high-performance filtration, trusted by riders and racers worldwide. Their powersports air filters are engineered to deliver maximum airflow without sacrificing engine protection, helping you get the most out of your ride.
Technical Specifications
- MFG. Part Number DU-9001
Vehicle Information
BMW R45 Motorcycle - Street (1978-1985)
The BMW R45, produced from 1978 to 1985, was an entry-level standard motorcycle. It featured an air-cooled, four-stroke, horizontally opposed boxer twin engine with a 473 cc displacement. Its primary variations were in engine power output rather than distinct trim levels. While no major redesigns occurred, the R45 received evolutionary updates. In 1981, it gained electronic ignition, Nikasil-coated cylinders, a transistor ignition, and a geared one-plate clutch. Seat height and wheelbase also saw minor adjustments. The main differentiation was between a 27 hp domestic (German) version and a 35 hp export version, differing in compression ratio and carburetors. FAQ:
Q: How do I know which parts fit my BMW R45?
A: To ensure perfect compatibility, please use the year and edition selector at the top of this page.
Maintenance
| Component | Interval | Details |
| Engine Oil and Oil Filter | Every 8 000 km or 6 months | For short distances or temperatures below 0°C, change oil every 3 000 km or 3 months. The oil filter should be renewed with every other oil change. |
| Spark Plugs | Every 20 000 km | |
| Air Filter | Every 20 000 km | |
| Alternator Belt | Every 40 000 km or 6 years |