How to Change the Coolant in a 2022 Beta 390 RR-S
Shop parts for a 2022 Beta 390 RR-S Dirt Bike.
The 2022 Beta 390 RR-S features a 385.6cc single-cylinder, 4-stroke, liquid-cooled engine with a robust cooling system designed for trail and dual-sport riding. Regular coolant changes are essential to maintain peak engine performance, prevent overheating, and protect the internal components of this street-legal enduro.
What You Need
- Fresh coolant formulated for liquid-cooled four-stroke engines (consult your owner manual for specifications – typically ethylene glycol-based, free of silicates)
- Basic hand tools: Allen wrenches, sockets, and Phillips screwdriver
- Catch pan for old coolant
- Safety gloves & eye protection
- Clean rags
Steps to Change Coolant
- Prepare the Bike – Ensure the motorcycle is on a stable surface, engine fully cooled, and ignition switched off. Remove the seat using the push-button system for easier access to the radiator.
- Drain the Radiator – Locate the radiator drain bolt at the base of the left radiator. Place the catch pan underneath, loosen the drain bolt, and allow the coolant to flow out completely. Inspect removed coolant for debris or discoloration as this can signal potential concerns.
- Flush (Optional but Recommended) – If the old coolant appears dirty or contaminated, fill the radiator with distilled water, reinstall the drain bolt, start the engine briefly, then repeat drain. Always shut down the bike immediately if the radiator is empty to avoid engine damage.
- Replace the Drain Bolt – After draining, securely reinstall the drain bolt. Avoid overtightening to prevent damage to threads or radiator.
- Add New Coolant – Remove the radiator cap and slowly add the recommended coolant until it reaches the proper fill level. Avoid overfilling to prevent system pressure issues. Bleed trapped air by gently tilting and shaking the bike side to side.
- Check for Leaks – Reinstall the radiator cap, start the bike, and let it idle for several minutes. Observe for leaks at the drain bolt, hose connections, or around the radiator. Top off coolant as needed after the system settles and recheck after your first ride.
- Replace the Seat – Once satisfied, reinstall the seat securely.
Key Notes for 2022 Beta 390 RR-S Owners
- This model uses a liquid-cooled, DOHC, single-cylinder engine for optimal temperature control during intense off-road and dual-sport use. Ensure you use coolant that is compatible with the aluminum radiator components and free of silicates.
- The cooling system includes a fan to maintain temperature during slow, technical riding and city use, a feature introduced in 2020 and retained due to its reliability.
- Confirm coolant capacity: The 2022 Beta 390 RR-S holds roughly 2.4 gallons (9.1 liters) of fuel. Coolant volume in the radiators is less, so consult your manual or fill to the marked level after draining.
- After a coolant change, monitor the temperature gauge and confirm normal readings through the digital dash.
Maintenance Tip
- Beta recommends checking the coolant level before every ride to avoid overheating and costly engine damage. Replace coolant at least once per year or as specified in your owner's manual for maximum protection.
Related Shopping Categories
Shop Radiators for a 2022 Beta 390 RR-S Dirt Bike.
Shop Coolant for a 2022 Beta 390 RR-S Dirt Bike.
Shop Temperature Sensors for a 2022 Beta 390 RR-S Dirt Bike.
Shop Tools for a 2022 Beta 390 RR-S Dirt Bike.
Shop Radiator Hoses for a 2022 Beta 390 RR-S Dirt Bike.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.