How to Change the Coolant in a 2011 Husqvarna CR125
Shop parts for a 2011 Husqvarna CR125 Dirt Bike.
Changing the coolant in your 2011 Husqvarna CR125 is a crucial maintenance task for safe and reliable performance, especially given the high-revving nature of this two-stroke motocross machine. The following guide, unique to MotoSport.com, offers a step-by-step procedure tailored for this model, highlighting important tips every owner should know before starting.
Tools & Supplies Required
- Fresh coolant suitable for aluminum motocross radiators (silicate-free, non-distilled water recommended)
- Drain pan of adequate capacity
- Socket set (including 8mm and 12mm wrenches)
- Funnel
- Shop rags
- Protective gloves
Step-by-Step Coolant Change Procedure
- Ensure Safety & Preparation:
Make sure the engine is completely cool. Park the bike upright on stable, flat ground to ensure accurate draining and refilling. - Remove Radiator Cap:
Locate the radiator cap on the right side of the bike. Slowly remove the cap to release any built-up pressure. Never remove the cap when the engine is hot, as this may cause hot coolant to spray out. - Drain the Coolant:
Place your drain pan directly under the water pump area on the right side. On this model, the coolant drain bolt is usually found at the bottom of the water pump casing. Using the appropriate socket (most often 8mm), loosen and remove the bolt. Allow all the old coolant to fully drain.
- Inspect Parts:
Check the sealing washer on the drain bolt and replace if flattened or damaged. Inspect radiator hoses for cracks, brittleness, or leaks. Early replacement eliminates future problems.
- Reinstall Drain Bolt:
Once completely drained, reinstall the water pump drain bolt using a new sealing washer if necessary. Tighten to the manufacturer's specified torque to prevent leaks.
- Refill with Coolant:
Slowly pour new coolant into the right-hand radiator via the filler neck. The coolant level should be about 0.39 in (10 mm) above the radiator cells when the engine is cold. Do not overfill.
- Bleed Air from System:
Reinstall the radiator cap loosely. Start the engine and let it idle with the bike upright. As the engine warms, gently squeeze the radiator hoses with a shop rag to help air bubbles escape. Turn off the engine and let it cool, then top up the coolant if the level drops.
- Final Checks:
Ensure the coolant remains at the proper height once the engine is cooled. Check for leaks around the drain bolt and hoses. Securely reinstall the radiator cap. Wipe away any spilled coolant, as it can be slippery and corrosive.
Key Notes for 2011 Husqvarna CR125 Owners
- This model uses a high-revving two-stroke engine, which runs hotter than many four-strokes. Strictly follow the correct coolant level–even minor shortages can cause overheating.
- Regularly inspect radiator hoses and fasteners. Vibration from motocross use can loosen connections or wear out rubber parts faster than on trail bikes.
- Replace coolant every season or after any muddy or wet rides, as contamination can occur quickly in off-road settings.
- Never use straight tap water for coolant. Use either pre-mixed motocross coolant or combine distilled water with appropriate additives for maximum corrosion protection.
- Consult your owner's manual for the exact coolant capacity and tightening torque for the drain bolt to avoid overtightening or underfilling.
Why Proper Coolant Maintenance Matters
The 2011 Husqvarna CR125's lightweight, liquid-cooled engine is its heart. Improper coolant maintenance can lead to overheating, piston damage, and premature engine wear. Following regular coolant replacement schedules ensures peak performance and long engine life – keep your ride ready for every moto with MotoSport.
Related Shopping Categories
Shop Radiators for a 2011 Husqvarna CR125 Dirt Bike.
Shop Coolant for a 2011 Husqvarna CR125 Dirt Bike.
Shop Temperature Sensors for a 2011 Husqvarna CR125 Dirt Bike.
Shop Tools for a 2011 Husqvarna CR125 Dirt Bike.
Shop Radiator Hoses for a 2011 Husqvarna CR125 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.