How to Change the Oil in a 2007 Honda CRF150R

Shop parts for a 2007 Honda CRF150R Dirt Bike.

Regular oil changes are essential for the reliability and longevity of your 2007 Honda CRF150R. This robust, race-oriented dirt bike requires specific attention to detail due to its high-performance engine and the presence of separate engine and transmission oil compartments. This guide, proprietary to MotoSport.com, walks you through every step, including special model-specific tips, the tools you need, and best practices for maintaining your CRF150R.

Tools and Supplies Needed

  • 10mm and 8mm socket or wrench (for drain bolts)
  • Socket wrench or ratchet
  • Flathead screwdriver (optional, for removing covers)
  • Oil catch pan
  • Funnel
  • Measuring cup or graduated oil bottle
  • Clean rags or paper towels
  • New engine oil (see below for capacity)
  • New oil filter (recommended but optional for every change)
  • Replacement O-ring or crush washer (for drain bolt and filter cover, as needed)
  • Rubber gloves (optional, but helps keep your hands clean)

Oil Type and Capacity

  • Engine oil capacity:
    • Without filter change: 550–560 ml
    • With filter change: 590–600 ml
  • Recommended oil: 4-stroke motorcycle oil 10W-40 (follow Honda‘s specification for best results)

Step-by-Step Instructions

  1. Warm up the motorcycle.
    Start your CRF150R and let it idle for 3-5 minutes. Warm oil drains out easier and removes more contaminants. Shut the engine off and use the kickstand or a bike stand to keep the bike upright.
  2. Gather your tools and supplies.
    Make sure everything is close at hand, including your new oil filter and the correct oil amount.
  3. Remove the engine and transmission drain bolts.
    • The CRF150R has two separate drain bolts: one for engine oil, and one for transmission oil.
      - Engine oil drain bolt is typically located under the crankcase, beneath the right crankcase cover. - Transmission drain bolt is on the opposite side, usually on the left side below the shift lever.
      Identify each bolt carefully to avoid mixing them up; refer to your owner‘s manual diagrams if in doubt.
      Tip: Place the oil catch pan beneath each bolt before loosening to avoid spills .
    • Use a 10mm wrench for most drain bolts. Turn counterclockwise to loosen.
      Allow all oil to fully drain out. Inspect the oil for unusual metal flakes, which could indicate engine wear.
  4. Replace the oil filter (recommended).
    Remove the small bolts securing the oil filter housing (right side of the engine).
    • Gently remove the filter and O-ring. Clean mating surfaces before installing the new filter.
      Important model call-out: The oil filter O-ring is prone to pinching if you rush or misalign when seating. Pinched or deformed O-rings often cause leaks on the CRF150R ; install carefully and inspect before reassembly.
    • Lightly oil the new O-ring for easier installation and a better seal.
    • Torque the filter cover bolts snugly but do not overtighten (check your owner‘s manual for specific torque).
  5. Install and tighten the drain bolts.
    • Inspect the crush washers on both drain plugs. Replace if deformed or damaged for a leak-free seal.
    • Install the drain bolts. Tighten until firm; avoid over-torquing, as the CRF150R‘s small engine cases are easy to strip threads.
  6. Add new engine oil.
    Using your measuring cup and funnel, slowly pour in 590–600ml (if changing the filter) of fresh engine oil through the oil filler hole (right side, below the fuel tank).
    • Pour slowly to avoid air pockets or splashing.
      Tip: Hold the funnel above the filler opening (don‘t seat it fully) to avoid slow draining and spillage.
  7. Check oil level.
    • Insert the dipstick (attached to the oil filler cap), but do not screw it in, and check the level. Add oil as needed to reach the upper mark.
  8. Add new transmission oil.
    Repeat the fill procedure on the transmission side (refer to your manual for correct volume), typically around 650ml for the CRF150R. Fill until it just begins to flow out the check hole.
  9. Start the engine and inspect.
    With both filler caps secured, start the bike and let it idle for 2-3 minutes. Check beneath the engine for leaks around the drain bolts and the filter cover.
    • Shut off the engine and check the oil levels once more. Add oil if needed.
  10. Dispose of waste oil properly.
    • Always recycle used oil and filters at a certified hazardous waste recycling center.

Model-Specific Call-Outs for the 2007 Honda CRF150R

  • Separate engine and transmission oils — Unlike many dirt bikes, the CRF150R does not use a shared oil system. Do not mix up which oil goes in which compartment; engine oil and transmission oil(such as Honda GN4 or Trans Oil) are filled and checked separately.
  • O-ring vulnerability — The oil filter cover O-ring can easily get pinched, leading to leaks. Always inspect and carefully fit this O-ring.
  • Avoid stripped drain bolts — The aluminum case threads are soft, and bolt overtightening is a frequent issue. Use a torque wrench if possible (check your manual for specifics).
  • Oil filter access — The filter is accessed from the right side behind a small round cover. Take note of orientation during removal—install the new filter exactly as the old one comes out.

Final Checks and Riding Tips

  • Never ride with oil below the dipstick minimum mark or with leaks present.
  • Always warm the engine fully before high-RPM use after an oil change.
  • Monitor for oil leaks and check level after the first ride post-change.

By following these steps, you can confidently change the oil on your 2007 Honda CRF150R and keep it running at peak performance. For all your parts and oil, trust MotoSport.com — your dirt bike experts.

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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.