How to Change the Oil in a 2024 Honda CRF150R Big Wheel

Shop parts for a 2024 Honda CRF150R Big Wheel Dirt Bike.

Changing the oil in your 2024 Honda CRF150R Big Wheel is a critical part of dirt bike maintenance that ensures your engine and transmission perform at their best. Regular oil changes protect your investment, promote longer engine life, and help deliver peak performance every time you ride. Below you'll find a detailed, step-by-step guide tailored specifically for the 2024 CRF150R Big Wheel, including all recommended tools, exact oil quantities, and specific owner call-outs you need to know.

Tools and Supplies Needed

  • Honda GN4 10W-40 four-stroke engine oil (or equivalent – you'll need at least 1.5 liters)
  • Honda genuine oil filter (if replacing the filter)
  • New oil filter O-ring
  • Drain plug crush washers (2x)
  • Ratchet, 8mm and 12mm socket or wrench
  • Oil drain pan
  • Clean rags or shop towels
  • Measuring cup or graduated cylinder
  • Small funnel
  • Flathead screwdriver (for seating the O-ring)
  • Torque wrench (recommended but not strictly required)
  • Latex/nitrile gloves (to keep your hands clean)

Preparation

  • Warm up your bike for 3-5 minutes. This helps the oil drain out more smoothly and completely.
  • Turn off the engine, set the bike upright and secure it on a stand or flat surface.
  • Gather all tools and supplies.

Step 1: Drain the Engine Oil

  • Locate the engine oil drain bolt (12mm) beneath the right side of the engine case.
  • Place the oil drain pan under the drain bolt. Carefully unscrew the bolt and let the oil flow out completely.
  • Remove the oil fill cap/dipstick to allow air in, which helps the oil drain faster.
  • Replace the crush washer with a new one before reinstalling the drain bolt. This is crucial to prevent leaks.
  • Tighten the drain bolt securely, ideally torquing to factory specs.

Step 2: Replace the Oil Filter (If Needed)

  • Remove the oil filter cover (three 8mm bolts on the right engine side).
  • Pull out the old oil filter. Be careful of any remaining oil that might spill.
  • Inspect the filter cover O-ring and replace if needed. Seat the new O-ring with a flathead screwdriver for a proper fit.
  • Install the new oil filter, ensuring the correct orientation.
  • Reinstall the oil filter cover and tighten the bolts evenly.

Step 3: Drain the Transmission Oil

  • Move to the left side of the bike to locate the transmission oil drain bolt.
  • Place your oil pan below and remove the drain bolt. Allow all transmission oil to drain completely.
  • Replace the crush washer on this bolt as well.
  • Reinstall and tighten the bolt to spec.

Step 4: Refill Engine Oil and Transmission Oil

  • Using a measuring cup, pour 590ml of 10W-40 oil into the engine side if you replaced the oil filter (560ml if you did not replace the filter).
  • Slowly pour the oil through a funnel into the designated engine fill port. Wait a few seconds to ensure no spills or overflows.
  • Check oil level with the dipstick: Insert (do not screw in) and pull out to verify the correct level. Adjust as needed.
  • Move to the transmission side and fill with 580ml of fresh oil.
  • There is a level check bolt beneath the clutch cover; when oil starts to drip from this bolt hole, the level is correct.

Step 5: Final Checks

  • Double-check that all drain and fill bolts are secure.
  • Wipe down the engine and surrounding area to remove any spilled oil.
  • Start the bike and let it run for 2-3 minutes.
  • Turn off the engine, allow the bike to sit for another 2-3 minutes, then check oil levels again and top off if necessary.
  • Dispose of used oil and filter responsibly; never pour used oil onto the ground or into drains.

2024 Model-Specific Owner Call-Outs

  • The 2024 CRF150R Big Wheel uses two separate oil compartments—one for the engine side and one for the transmission/clutch side. Be sure to use identical 10W-40 oil in both, but maintain the exact capacity specified for each.
    Mistakenly overfilling or cross-filling can cause performance issues or even engine damage.
  • If only the engine oil is being replaced (no filter), adjust the engine side fill volume to 560ml.
    Always use new crush washers for both drain bolts—reusing them is a leading cause of oil leaks.
  • Carefully tighten all drain bolts—aluminum cases can strip if overtightened.
  • The 2024 model's oil check methods remain unchanged from previous years—use the dipstick for the engine side and the level-check bolt for the transmission side.

Why Trust MotoSport.com?

At MotoSport.com, we're passionate about keeping your ride in top shape. These instructions are based on factory specs and real mechanic experience servicing Honda's race-winning motocross lineup. For all your OEM parts, oils, filters, and MotoSport-exclusive maintenance kits, check out our full Honda CRF150R catalog to make every oil change fast, safe, and hassle-free.

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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.