How to Change the Oil in a 2026 Honda CRF150R Big Wheel

Regular oil changes are essential for keeping your 2026 Honda CRF150R Big Wheel performing at its best. This step-by-step guide will walk you through the entire process with model-specific tips so you can keep your dirt bike race-ready. All content is proprietary to MotoSport.com.

Tools and Supplies Needed

  • 10mm and 12mm sockets or wrenches
  • Torque wrench
  • Oil drain pan
  • Funnel
  • Rags or paper towels
  • New engine/transmission oil (Honda GN4 10W-40 is recommended)
  • New oil filter
  • New drain plug crush washers (included in most oil change kits)
  • Gloves (optional, for cleanliness)

Recommended Parts and Oil Quantities

  • Engine Side Oil Quantity (with filter change): 590cc
  • Engine Side Oil Quantity (without filter change): 560cc
  • Clutch/Transmission Side Oil Quantity: 580cc
  • Applicable Oil Change Kit: Bolt Hardware Oil Change Kit for a 2026 Honda CRF150R Big Wheel Dirt Bike. (contains O-rings and drain plug washers)

Preparation

  • Warm up the engine for 3–5 minutes to ensure the oil flows out smoothly (do not overheat).
  • Turn off the bike, place it securely on a stand or flat, stable ground.
  • Clean dirt or debris from the engine cases, drain bolts, and filler caps to prevent contamination.

Step-by-Step Instructions

  • 1. Drain the Engine Oil
    • Locate the engine oil drain bolt (right side of the engine beneath the crankcase).
    • Place your oil pan beneath the bolt and remove it using the appropriate socket or wrench.
    • Allow the oil to fully drain. Inspect and replace the crush washer as needed to prevent leaks.
  • 2. Remove and Replace the Oil Filter
    • Locate the oil filter cover (right side, near the front of the engine).
    • Remove the filter cover bolts and pull the old filter out.
    • Check for correct orientation and install a new filter. Replace the O-ring on the cover if necessary (most kits include a replacement).
    • Reinstall the filter cover, tightening the bolts evenly and to torque specification (consult owner's manual if needed).
  • 3. Drain the Clutch/Transmission Oil
    • Locate the clutch side drain bolt (left side of the engine beneath the case).
    • Repeat the above procedure: remove bolt, drain oil, and replace the crush washer.
    • Reinstall the bolt and torque to spec. Do not overtighten to avoid stripping threads.
  • 4. Add New Oil
    • On the engine side, remove the oil filler cap/dipstick and use a funnel to pour in 590cc of new oil if you changed the filter, or 560cc if you did not.
    • On the clutch side, remove the filler bolt and add 580cc of oil.
    • Reinstall the oil filler caps securely.
  • 5. Final Steps
    • Start the bike and let it run for a minute. This circulates oil through the engine and filter.
    • Shut off and let the bike sit for several minutes to allow oil to settle.
    • Check oil levels using the dipstick or sight glass, and adjust if necessary.
    • Inspect for leaks at the drain bolts and oil filter cover.

CRF150R Big Wheel (2026) Model-Specific Callouts

  • Separate Engine and Clutch Compartments: The CRF150R has two separate drains and fillers for engine and clutch/transmission oil. Be sure to change both sides each time for complete service.
  • Use Correct Oil Volumes: Do not overfill. Always measure carefully. Overfilling or underfilling can damage engine or clutch components.
  • Replace All Crush Washers: Prevent oil leaks and stripped threads by always using new crush washers with each oil change.
  • Check Filter O-Ring: Ensure filter cover O-ring is clean and undamaged; replace if worn (kits contain spares).
  • Tighten Drain Bolts Carefully: The case threads are soft aluminum and can strip easily. Use a torque wrench and consult your owner—s manual for specs (usually around 12 Nm).
  • Double-Check for Leaks: Once the bike has been run and checked, keep an eye out for leaks after your first ride post-maintenance.

Responsible Oil Disposal

  • Collect all used oil and dispose of it at an approved recycling facility. Do not pour oil on the ground or down drains.

Conclusion

  • Regular oil changes are the best way to extend the life of your Honda CRF150R Big Wheel. Stick to the right oil type, volume, and torque settings, and always use replacement washers and O-rings for a leak-free result. For all your Honda maintenance needs and premium oil change kits, trust MotoSport.com—your ultimate source for factory-level performance and parts.

Related Shopping Categories

Shop Motor Oil for a 2026 Honda CRF150R Big Wheel Dirt Bike.

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Shop Tools for a 2026 Honda CRF150R Big Wheel Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2026 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.