How to Change the Oil in a 2016 Honda CRF150R Big Wheel

Shop parts for a 2016 Honda CRF150R Big Wheel Dirt Bike.

If you own a 2016 Honda CRF150R Big Wheel, regular oil changes are essential for maintaining optimal engine performance and extending the lifespan of your bike. This guide—proprietary to MotoSport.com—will walk you through a robust, step-by-step process for changing the oil on this specific model, with details on tools, quantities, and unique callouts every owner should know.

Tools and Materials Needed

  • Sockets and Wrenches (preferably metric, 12mm and 8mm are common)
  • Oil Catch Pan
  • Rags and Gloves (for safety and cleanup)
  • Funnel
  • New Engine Oil (10W-40 motorcycle oil, GN4 Honda recommended)
  • New Oil Filter (optional, but recommended)
  • Replacement O-rings for drain bolts
  • Drain Plug Crush Washers (recommended to replace with each oil change)
  • Service Manual for technical references (optional but helpful)

Preparation

  • Start your bike and let it run for 2-3 minutes to warm the oil. Warm oil drains more thoroughly.
  • Shut off the bike, then place it securely on a stand or level ground.
  • Make sure you have a clean workspace free from dust or debris.

Step-by-Step Oil Change Instructions

  1. Locate the Drain Bolts
    • The 2016 CRF150R Big Wheel has two oil compartments: one for the engine side and one for the transmission (clutch) side. Each compartment has its own drain bolt and fill cap.
    • The engine side drain bolt is on the left side, and the clutch/transmission drain bolt on the right. Both are located near the frame's bottom.
  2. Remove the Drain Bolts
    • Position your oil catch pan under the drain bolt you're working on.
    • Use an appropriate socket to carefully loosen and remove one drain bolt at a time. Allow the oil to drain completely from each compartment.
    • Be cautious to avoid stripping the drain bolts, as the threads are easily damaged on these models. Replace crush washers if damaged or every oil change for best sealing.
  3. Remove and Replace the Oil Filter
    • The oil filter is located under a cover held on by three bolts (engine side, left).
    • Remove the cover, take out the old oil filter, and check the O-ring condition. Replace the O-ring if cracked or flattened.
    • Install the new filter, reinstall the cover, and torque bolts according to specifications from your manual.
  4. Reinstall Drain Bolts
    • Wipe any debris off the drain bolts and mating surfaces.
    • Install new crush washers and hand-tighten each bolt before using a torque wrench for final tightening (refer to your manual for exact torque–over-tightening can strip threads).
  5. Add New Oil
    • Engine side: Use 10W-40 motorcycle oil. For a full oil and filter change, add 590cc. If just the oil, add 560cc

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    • Clutch/Transmission side: Use the same 10W-40 oil. Add 580cc

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    • Use a clean funnel to avoid spills. Add oil to each compartment using their respective fill caps (dipstick for engine side).
  6. Check Oil Levels
    • With the bike upright and on a level surface, use the dipstick (engine side) and check window (if equipped) to confirm oil is within specified range after filling. Do not overfill.
    • After both compartments are filled, start the engine and let it idle for 1-2 minutes. Shut it off, let it sit for a minute, then recheck oil levels and top off if necessary

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  7. Clean Up
    • Wipe up any spills and dispose of old oil and filters at a designated recycling center.
    • Double-check for any leaks around drain bolts and oil filter cover.

Model-Specific Callouts for CRF150R Big Wheel

  • The CRF150R's dual oil compartments mean you must change both the engine and clutch (transmission) oils separately. Never mix up the fill plugs or drain bolts–they are independent systems

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  • Pay special attention to the crush washers on the drain bolts. Changing them every oil service helps prevent leaks and stripped threads

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  • Use only JASO MA-rated 4-stroke motorcycle oil. Automotive oil can damage your clutch.
  • Do not overtighten drain bolts–these easily strip. Always use a torque wrench set to the manufacturer's recommended values.
  • If you only change the oil and not the filter, reduce the fill quantity by about 30cc for the engine compartment (560cc)

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  • After refilling both sides and running the bike, always recheck oil levels to ensure both compartments are topped up properly

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Conclusion

By following this guide, you can confidently change the oil on your 2016 Honda CRF150R Big Wheel, ensuring reliable engine and clutch performance. Pay special attention to compartment separation, oil quantities, and bolt tension for the best results and long-term durability of your dirt bike.

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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.