How to Change the Coolant in a 2015 Beta 250 RR Race

Shop parts for a 2015 Beta 250 RR Race Dirt Bike.

Keeping the coolant fresh in your 2015 Beta 250 RR Race ensures reliable performance and optimal engine temperature management, whether you are trail riding or racing. Unique aspects of the 2015 250 RR Race, such as Beta's two-stroke engine and lightweight aluminum radiators, mean this procedure is straightforward but requires careful attention to avoid introducing air into the system. Here are step-by-step instructions proprietary to MotoSport, designed specifically for your MMY dirt bike:

What You Will Need

  • Pre-mixed, high-quality motorcycle coolant compatible with aluminum components
  • Catch pan for old coolant
  • Basic hand tools (screwdriver, sockets/wrench set)
  • Funnel
  • Clean rags
  • Safety gloves and eyewear

Step-by-Step Coolant Change Guide

  • Let the Engine Cool: Always begin with a cold engine to avoid burns.
  • Access the Radiator: Remove the seat and left shroud to access the radiator cap and drain bolt.
  • Drain the Old Coolant:
    • Place the catch pan beneath the water pump (right side of engine).
    • Locate the coolant drain bolt on the lower water pump cover.
    • Remove the radiator cap, then unscrew the drain bolt and allow all coolant to fully drain.
  • Inspect and Clean: Check the drain bolt and copper washer for any damage or debris. Clean both components before reinstalling.
  • Reinstall the Drain Bolt: Tighten by hand, then torque to the manufacturer’s specification (do not overtighten to avoid stripping soft aluminum threads).
  • Fill the System:
    • Slowly pour coolant into the radiator neck on the left side until it’s just above the radiator core (you should see the fluid at the base of the filler neck).
    • Gently rock the bike from side to side to help dislodge trapped air bubbles.
    • Top off the radiator as needed until the coolant level no longer drops after rocking. The 2015 Beta 250 RR Race holds just over 1 liter in the cooling system–do not exceed the max fill line.
  • Bleed Remaining Air:
    • Beta models from this era typically do not have bleeder screws on the radiator; rely on rocking the bike and gentle tapping on the hoses to release bubbles.
  • Reinstall the Radiator Cap: With coolant just above the radiator core, fasten the cap securely.
  • Run and Check:
    • Start the bike and idle for a few minutes until warm. Gently rev and observe coolant movement–watch for overflow or leaks.
    • Let the engine fully cool, then recheck the coolant level and top off if needed.

Notes Specific to the 2015 Beta 250 RR Race

  • The two-stroke 250 RR Race lacks a radiator bleeder screw – take extra time to ensure all air is purged to prevent hot spots or overheating.
  • Always use coolant safe for aluminum–mixing incompatible antifreeze can cause internal corrosion and compromise the water pump seals.
  • Inspect the radiator hoses for brittleness or swelling, common on older Beta bikes, and replace if worn.
  • The RR Race edition may have stiffer suspension and different plastics versus standard RR models, but the cooling system procedure remains unchanged.
  • Follow Beta’s interval for coolant replacement – typically every season or after extensive muddy/race conditions.

Finishing Up

Reinstall the seat and shrouds. Dispose of used coolant responsibly–it is toxic to people and animals. Give your bike a thorough inspection for leaks on your first ride, and periodically check coolant levels since trapped air may purge itself into the reservoir during the first ride or two.

Related Shopping Categories

Shop Radiators for a 2015 Beta 250 RR Race Dirt Bike.

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Shop Temperature Sensors for a 2015 Beta 250 RR Race Dirt Bike.

Shop Tools for a 2015 Beta 250 RR Race Dirt Bike.

Shop Radiator Hoses for a 2015 Beta 250 RR Race 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.