How to Change the Oil in a 2015 Honda CRF50F: A MotoSport.com Exclusive Guide

Shop parts for a 2015 Honda CRF50F Dirt Bike.

If you own a 2015 Honda CRF50F, regular oil changes are key to maximizing engine life and ensuring peak performance. Whether you're a first-timer or a seasoned owner, this guide provides a comprehensive, step-by-step oil change tutorial crafted exclusively for MotoSport.com readers.

Tools and Supplies Needed

  • 17 mm socket and socket wrench
  • Torque wrench (capable of 18 ft-lb – 25 Nm)
  • Drain pan (low profile preferred)
  • Shop towels or rags
  • New engine oil: 10W-40 (Honda GN4 or Maxima SynBlend are popular choices)
  • New drain plug sealing washer (recommended)
  • Funnel
  • Gloves (optional, for cleanliness)

Preparation Steps

  • Ensure your bike is on a firm, level surface to allow complete oil drainage and accuracy when refilling.
  • Start the engine and let it idle for 3–5 minutes to warm up the oil, making it easier and more thorough to drain. Warm oil flows more freely, removing more impurities and protecting the engine.
  • Turn the engine off and wait 2–3 minutes to ensure all oil settles in the crankcase.
  • Gather all your tools and supplies before you begin to prevent interruptions.

Step-by-Step Oil Change Instructions

  • Remove the oil fill cap/dipstick on the right side of the engine to allow air in, which helps the oil drain more completely.
  • Place your drain pan under the crankcase. Clearance is low, so a shallow pan works best.
  • Locate the oil drain bolt (17 mm) – do not confuse it with the cam chain tensioner push rod bolt, which is nearby and should not be removed. The correct drain bolt is on the bottom of the right side of the case.
  • Remove the drain bolt with your 17 mm socket. Don’t lose the sealing washer. Allow oil to drain completely into your pan.
  • Gently tilt the bike side to side to help any remaining oil exit. This ensures as much old oil leaves the engine as possible.
  • Check and replace the drain bolt sealing washer (recommended every oil change for leak prevention). If the old washer is worn or damaged, swap in a new one.
  • Reinstall the drain bolt. Tighten with a torque wrench to 18 ft-lb (25 Nm) to ensure a proper seal and avoid overtightening, which could damage engine threads.
  • With the bike upright and level, use a funnel to add new oil. The 2015 Honda CRF50F typically takes about 0.8 quarts (0.75 liters) of oil, but always reference your owner’s manual or dipstick for the exact fill. Use 10W-40 oil for most climates.
  • Reinstall the fill cap/dipstick, then start the engine. Let it idle for a minute, then turn it off and check for leaks around the drain bolt.
  • After a minute or two, recheck the oil level with the dipstick. Add oil as needed to bring it to the full mark, then re-secure the dipstick.

Model-Specific Call-Outs for 2015 Honda CRF50F

  • Drain plug access is low: Clearance is tight under the CRF50F, so a low-profile drain pan is ideal. Ensure your tools fit under the bike before starting.
  • Small engine capacity: Only a small amount (about 0.8 quarts) of oil is required. Do not overfill, as too much oil can cause engine problems.
  • Drain plug torque is critical: 18 ft-lb (25 Nm) is the specified torque – overtightening may strip the threads on this small engine.
  • Cam chain tensioner bolt warning: The tensioner push rod bolt is located close to the oil drain bolt. Removing the wrong bolt can lead to internal engine problems. Always check your owner’s manual diagram to verify the correct bolt before loosening anything.
  • Sealing washer importance: A new washer each change helps prevent leaks, which are more likely on smaller engines with aluminum parts.

Environmental Note

  • Dispose of used oil properly: Pour the drained oil into a proper container and bring it to a recycling center, automotive store, or waste facility. Never pour used oil on the ground or down drains. It’s harmful to the environment and illegal in most places.

Final Inspection

  • Check around the drain bolt and underneath the engine for leaks after your test idle.
  • Monitor the oil level for the next few rides and top up if necessary. Always keep the oil topped up for best performance and engine longevity.
  • Make note of the mileage/hours or date of your oil change for future maintenance scheduling.

With the above steps, your 2015 Honda CRF50F is ready for action. Routine oil changes are the secret to long-lasting performance, smoother shifts, and maximum reliability.

This guide is proprietary content provided exclusively for MotoSport.com readers. Ride safe and maintain your bike like a pro.

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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.