All Balls Swing Arm Bearing Kit
1020-7594 (MFG #: 28-1139)
$77.05
Sale price
$77.05
Regular price
$77.05
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All Balls Swing Arm Bearing Kit for BETA RX 300 Dirt Bike
All Balls Swing Arm Bearing Kit for BETA RX 300 Dirt Bike
$77.05
Sale price
$77.05
Regular price
$77.05
SKU:1020-7594
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Description
FEATURES
- 52100 bearing steel is used in these rebuild kits for motocross, off-road, and dual-purpose bikes
- Kits include all the bearings, seals, shafts and spacers required for a complete rebuild
- Thrust bearings are replaced with Teflon® bearings, which perform better in dirt and water
- Expansive application chart covers bikes from the 70's to present
- Imported
Technical Specifications
- MFG. Part Number 28-1139
Vehicle Information
BETA RX 300 Dirt Bike (2021-2026)
The Beta RX 300 (2021-2026) is a high-performance two-stroke motocross model, consistently featuring a liquid-cooled, single-cylinder 293cc engine. Designed as a singular, specialized trim level for competition, it has seen continuous refinements rather than distinct trim variations. Horsepower figures hover around 40 hp for most years. While the core engine displacement remained constant, the RX 300 underwent significant evolution. The 2022 model marked a "second generation" with chassis rigidity improvements, updated KYB suspension settings, a lower seat, and a new diaphragm-spring clutch. A major overhaul arrived in 2025, introducing a new, more durable frame, an aluminum sub-frame, revised engine porting, and a shift from a six-speed to a five-speed transmission. Suspension was further enhanced with a larger 50mm rear shock body and new valving. The 2026 model is expected to carry over these substantial 2025 updates. Q: Is this product compatible with all Beta RX 300 models from 2021 to 2026?
A: Compatibility can vary based on the specific model year due to significant updates in certain years. Please use the year/edition selector on this page to ensure a guaranteed fit for your vehicle.
Maintenance
| Component | Interval | Details |
| Engine Oil and Filter | Recreational Riding: Every 10 hours. Aggressive/Race-Level Riding: Every 5 hours. | The oil filter should be changed with each oil change. |
| Air Filter | Recreational Riding: Every 15 hours. Aggressive/Race-Level Riding: Every 5 hours. | Critical for engine performance and preventing dirt ingress. |
| Coolant Level | Check every 20 hours. | |
| Drive Chain | Clean and lubricate every 5 hours. | Inspect and lubricate after every wash or ride. Check and adjust tension as needed. |
| Top-End Inspection | Recreational Riding: Every 50 hours. Aggressive/Race-Level Riding: Every 30 hours. | Based on recommendations for 2023 RX models. |
| Bottom-End Inspection | Aggressive/Race-Level Riding: Every 60 hours. | Based on recommendations for 2023 RX models. No specific recreational interval is provided for this model. |
These intervals are provided as a guide. Always consult the official owner's manual for your specific Beta RX 300 model for the most accurate information.