How to Change the Coolant in a 2016 Honda CRF150R Big Wheel
Shop parts for a 2016 Honda CRF150R Big Wheel Dirt Bike.
Your 2016 Honda CRF150R Big Wheel is built for performance, and routine coolant changes keep the engine running safely on the track or trail. This guide provides step-by-step instructions unique to your CRF150RB, including tips for model-specific issues and reminders to help you avoid common mistakes.
What You Need
- Fresh coolant (silicate-free, pre-mixed or recommended mix with distilled water, specifically for aluminum engines)
- Drain pan
- 10mm wrench or socket
- Shop towels
- Funnel
- Gloves and eye protection
Step-by-Step Coolant Change
- Let the Engine Cool
Never service the cooling system while hot to prevent burns. Wait until the engine is completely cool. - Remove the Radiator Cap
Locate the radiator cap on the right side of the CRF150RB. Open it slowly to relieve any pressure left in the system. - Locate the Water Pump Drain Bolt
On the right side of the engine, find the water pump with a single 10mm drain bolt and a copper sealing washer. Place your drain pan underneath. - Drain Old Coolant
With your pan ready, loosen and remove the drain bolt. Coolant will start draining. To allow smooth, full drainage, also open the radiator cap completely at this stage. - Flush if Desired
If the coolant was old or contaminated, flush the radiator and water passages with distilled water before final refill. Do not use tap water, as minerals can damage aluminum parts. - Inspect Parts
Check the condition of the copper sealing washer and the drain bolt. Replace if there is excessive wear or damage, as leaks may occur otherwise. - Reinstall the Drain Bolt
Tighten the bolt securely but do not overtighten to avoid stripping threads or crushing the washer. - Add New Coolant
Using a funnel, pour fresh coolant slowly into the radiator until full. Do not fill past the bottom of the filler neck. - Bleed Air from the System
With the cap off, lean the bike from side to side and gently tap the cooling system hoses, allowing air bubbles to rise. Top off as needed. - Check for Leaks
Inspect all connection points for leaks before proceeding. - Replace the Radiator Cap
Secure the cap and clean up any spills before starting the bike. - Warm Up the Engine
Start the engine and let it idle with the cap on for a few minutes. Shut down, allow to cool, and check the coolant level again. Top off if necessary.
Special Notes for the CRF150RB Model
- The radiator is compact, so take care not to overfill or spill coolant, which can introduce air pockets.
- Inspect hoses and the water pump for leaks or deterioration, as issues here are common sources of coolant loss on older or high-use bikes.
- If the engine overheats frequently, the water pump seal or impeller may need inspection or replacement. Persistent leaks could signal a worn shaft or damaged gasket.
- CRF150RB models are designed for competition use and run at higher RPMs–address any cooling system weakness immediately for engine protection.
- Never use silicate-based or automotive coolant–stick to dirt-bike-specific, silicate-free formulas for optimum water pump and seal life.
Environmental & Safety Reminders
- Dispose of old coolant safely. Never pour used coolant on the ground or down the drain–take it to an auto parts store or recycling center that accepts hazardous fluids.
- Keep coolant away from pets and children–ethylene glycol formulas are toxic and attractive to animals.
A proper coolant change on your 2016 Honda CRF150RB keeps it ready for high performance and long life. Maintain your ride with the right parts and fluids from MotoSport.
Related Shopping Categories
Shop Radiators for a 2016 Honda CRF150R Big Wheel Dirt Bike.
Shop Coolant for a 2016 Honda CRF150R Big Wheel Dirt Bike.
Shop Temperature Sensors for a 2016 Honda CRF150R Big Wheel Dirt Bike.
Shop Tools for a 2016 Honda CRF150R Big Wheel Dirt Bike.
Shop Radiator Hoses for a 2016 Honda CRF150R Big Wheel 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.