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Description
FEATURES
- Complete assemblies, ready to install into the shock body
- Made from 6061-T6 aluminum and the same custom elastomer as our fork seals
- All have air bleed holes to help remove air from the oil reservoir during installation
- Double-lip oil seal designed to keep out dirt and keeps friction low
- Some models have updated designs for easier installation
- Includes aluminum body, dust seal, bushing, oil seal, O-ring, internal guide bushing/washer, snap ring and top out bumper
- Made in the U.S.A.
Technical Specifications
- MFG. Part Number 37-1125
Vehicle Information
BETA RC 450 Dirt Bike (2025-2026)
The Beta RC 450, available for the 2025 and 2026 model years, is a cross-country motorcycle designed for performance. It shares its robust platform with the 450 RX motocrosser, ensuring a powerful and capable engine. Its 449.3 cc liquid-cooled, four-stroke, single-cylinder engine comes with electric start and a 5-speed transmission. While Beta does not provide an official horsepower figure for the RC 450, the closely related RX model, on which it is based, produces 57.8 hp at 9900 rpm and 47.15 Nm of torque at 7400 rpm. The RC 450 is described as having a "much spicier state of tune" and "more sheer output" than many other off-road bikes in its class. For 2025, the RC 450 was introduced with a chrome-moly steel frame, Nissin brakes, a KYB AOS 48mm fork, a KYB 50mm rear shock, and black rims. In 2026, significant enhancements were made: the KYB suspension received updated valving, the rear axle diameter was increased to 22mm, and XTrig FlexFix isoelastic handlebar mounts were introduced. Engine mapping was also updated, and the rims changed to blue. The engine, shared with the RX, also benefited from an optimized cylinder head, a matched intake manifold, and a redesigned exhaust for increased power, along with a revised counterbalancer shaft to reduce vibration. Q: Does this page contain information for Beta RC 450 models other than 2025-2026?
A: No, this page focuses exclusively on the 2025 and 2026 Beta RC 450 models. To find parts compatible with other years or models, please use our vehicle selector.
Maintenance
| Component | Interval | Details |
| Engine Oil and Oil Filter | Every 5 or 10 hours | 5 hours for aggressive/race-level riding; 10 hours for recreational riding. The 2025 model features a dual-chamber oil system. Replace filter with each oil change. |
| Air Filter | Every 5 or 15 hours | 5 hours for aggressive/race-level riding; 15 hours for recreational riding. Check after every ride, especially in dusty conditions. |
| Spark Plug | Every 30 hours | General recommendation for off-road motorcycles. Inspect and replace as needed. |
| Coolant | Every 12 months or 60-90 hours | General recommendation for similar Beta 4-stroke models. Inspect annually and check level frequently. |