How to Change the Coolant in a 2016 Beta 390 RR – Exclusive MotoSport Guide
Shop parts for a 2016 Beta 390 RR Dirt Bike.
Regular coolant replacement is essential for optimal engine temperature and longevity on your 2016 Beta 390 RR. The process is straightforward, but following every step and safety warning is vital to prevent engine damage and personal injury. Here is a step-by-step guide, tailored specifically for 2016 Beta 390 RR owners:
Before You Begin
- Work only when the engine is completely cool. Removing the radiator cap while hot is extremely dangerous due to pressurized steam. Allow several hours after riding.
- Wear protective gloves and eyewear to avoid skin and eye contact with coolant.
- Have a catch container for used coolant and dispose of it safely—never pour coolant down drains or onto the ground.
Tools & Supplies Needed
- Socket wrench set (to remove engine guard/protector and drain bolts)
- Fresh coolant (consult your owner’s manual for recommended type—2016 Beta 390 RR requires specific coolants to avoid galvanic corrosion and maintain gasket integrity)
- Replacement crush washer for drain bolt
- Shop towels/rags for cleanup
Step-by-Step Coolant Change Procedure
- Set the bike upright on level ground, ideally on a stand.
- Remove the engine protection plate (bash plate) by loosening the screws on the underside. This exposes the coolant drain points. Retain all hardware for reassembly. Tighten these bolts to 10 Nm during reinstallation.
- Unscrew the radiator cap slowly to release any residual pressure. (Remember: only do this when the engine is cold.)
- Place a catch container beneath the engine near the coolant pump area.
- Remove the main drain bolt, typically located at the water pump cover (identified in your manual as “screw 2”). Allow all coolant to drain completely.
- Replace and tighten the drain bolt with a new crush washer to ensure a proper seal.
- Open the secondary drain point (identified as “drain screw 3” in the manual) if equipped, and repeat the draining process. Not all 2016+Beta models include a traditional bleed screw so check for your specific configuration.
- If desired, flush the system by briefly filling with distilled water and draining again. This removes any lingering debris or old coolant.
- Fill the radiator with new, approved coolant until visible at the bottom of the filler neck, or as specified in your manual (observe exact quantities).
- Bleed trapped air: Slowly rock the bike side to side. On the 2016 Beta 390 RR, most air should self-bleed through the filler neck—previous model years had a radiator bleed screw but recent years may not. Fill as necessary until the coolant level stabilizes just above the radiator core fins.
- Reinstall all removed parts (engine plate, bolts, etc.) and replace the radiator cap securely.
- Start the engine and let it idle for a few minutes. Watch for leaks and allow trapped air bubbles to purge. Stop the engine and let it cool again, then recheck the coolant level—top off as necessary.
- Dispose of old coolant responsibly. Most auto shops will accept used coolant for recycling.
2016 Beta 390 RR Model-Specific Notes
- Coolant Type: The 390 RR uses an all-aluminum cooling system. Never use standard automotive coolant meant for copper radiators. Use the recommended ethylene glycol-based coolant formulated for motorcycles, as listed in your owner’s manual.
- Capacity: Check your manual for the exact radiator volume. Overfilling can cause pressure loss during heat cycles; underfilling risks overheating.
- Coolant Service Interval: Although some riders stretch intervals, annual coolant changes are best for high-performance off-road bikes like the Beta 390 RR.
- Cooling Fan Consideration: If your 390 RR is equipped with an aftermarket or factory cooling fan accessory, ensure it is reconnected and clear of any coolant residue after service.
- Common Problems: The 2016 Beta 390 RR can be prone to overheating in tight, technical terrain. Using top-quality coolant, maintaining proper level, and keeping radiator fins clean all help prevent hot running.
Final Check
- After reassembly and the first post-change ride, closely monitor coolant levels and check for leaks.
- If you notice froth, milky coolant, or rapid coolant loss, seek service immediately—these are signs of head gasket or water pump issues.
Refresh your coolant regularly for peace of mind on every ride. Proper cooling is vital for performance and engine longevity on your Beta 390 RR.
Related Shopping Categories
Shop Radiators for a 2016 Beta 390 RR Dirt Bike.
Shop Coolant for a 2016 Beta 390 RR Dirt Bike.
Shop Temperature Sensors for a 2016 Beta 390 RR Dirt Bike.
Shop Tools for a 2016 Beta 390 RR Dirt Bike.
Shop Radiator Hoses for a 2016 Beta 390 RR 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.
