How to Change the Coolant in a 2017 Beta 390 RR

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Performing regular coolant changes on your 2017 Beta 390 RR is a critical step in ensuring optimal engine cooling and longevity. Here is a detailed, MotoSport-exclusive guide for a safe and thorough coolant replacement, with notes specific to your model.

Tools & Supplies Needed

  • Fresh, recommended coolant (from the Beta-approved list)
  • Ratchet or screwdriver (for engine and skid plate bolts)
  • Suitable catch pan for old coolant
  • Protective gloves & eyewear
  • Torque wrench (for skid plate reinstallation)
  • Shop towels

Before You Start

  • Only change coolant when the engine is fully cool. Opening the radiator or drain plugs while hot can cause serious burns from pressurized fluid and steam.
  • Wear gloves and eye protection. Avoid skin and eye contact with coolant as it is toxic.
  • Work in a well-ventilated area, and keep coolant out of reach of children and pets.

Step-by-Step Coolant Change Guide

  1. Stabilize Your Beta 390 RR
    Place your bike on a secure stand or keep it upright. The bike needs to be vertical for proper draining and filling.
  2. Remove the Skid Plate/Engine Guard
    Use the appropriate tool to remove the bolts securing the engine guard or skid plate, providing access to the coolant drain bolts and radiator area. Store the bolts so they are not misplaced.
  3. Remove the Radiator Cap
    Slowly and carefully unscrew the radiator cap to release any residual pressure. Never do this if the engine is hot.
  4. Drain the Old Coolant
    Place your catch pan under the water pump drain bolt (often found at the lowest point on the engine casing). Remove this bolt and allow the coolant to fully drain. Some 2017 390 RRs have a specific drain screwconsult your owner's manual diagram to confirm location.
    Replace the drain bolt using a new washer or gasket if specified, to prevent leaks. Torque to spec.
  5. Optional: Flush the System
    If you want to remove residual deposits, you may pour distilled water through the system and repeat the drain process. Do not leave plain water in the system for storage or usealways refill with the correct coolant.
  6. Check and Tighten Hose Clamps (Known 390 RR Note)
    Model-specific tip: It is common for some Beta 4-strokes, including the 2017 390 RR, to have radiator hose clamps that may not be fully seated from the factory. Double-check all hose connections and clamps around the radiator for tightness and proper fit to prevent leaks.
  7. Refill with New Coolant
    With the drain bolt replaced and tightened, slowly add coolant through the radiator neck. Allow coolant to settle and burp any air by squeezing radiator hoses gently.
  8. Bleed Air from the System
    Some models have a secondary bleed screw on the cylinder head or upper radiator area. Loosen this briefly until only fluid (no bubbles) escapes, then retighten to spec.
  9. Reinstall Engine Guard/Skid Plate
    Torque bolts to 10 Nm, as specified for this model, ensuring correct fitment and protection.
  10. Start and Warm Up the Engine
    Start the bike and let it idle until it fully warms up with the radiator cap installed. Shut it off, allow it to cool, then check your coolant level once more. Top off as needed.

Additional Tips for 2017 Beta 390 RR Owners

  • Use only the coolant type specified by Beta to avoid corrosion and overheating—the manual lists approved formulas. Many owners use pre-mixed, silicate-free motorcycle coolants.
  • After any coolant service, inspect for drips or leaks under the radiator and at hose junctions for the next few rides.
  • Check the coolant level regularly through the season, especially after your first ride post-change, as trapped air may settle out.
  • The typical coolant capacity for this model is just over 1 liter, but always check your owner's manual for the exact amount.
  • Improper coolant changes or neglecting gasket/washer replacements are common sources of leaks—double-check these areas when reassembling.

Maintaining your 2017 Beta 390 RR's cooling system is straightforward, but attention to detail—like sealing hose clamps, using the right coolant, and carefully bleeding air—ensures long engine life and consistent off-road performance. For all your OEM-quality replacement parts, fluids, and tools, be sure to Shop parts for a 2017 Beta 390 RR Dirt Bike.

Related Shopping Categories

Shop Radiators for a 2017 Beta 390 RR Dirt Bike.

Shop Coolant for a 2017 Beta 390 RR Dirt Bike.

Shop Temperature Sensors for a 2017 Beta 390 RR Dirt Bike.

Shop Tools for a 2017 Beta 390 RR Dirt Bike.

Shop Radiator Hoses for a 2017 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.