How to Change the Oil in a 1996 Honda CR125

Shop parts for a 1996 Honda CR125 Dirt Bike.

  • About the Honda CR125
  • The Honda CR125 is a high-performance two-stroke dirt bike, and the 1996 model is a classic loved by both racers and off-road enthusiasts for its lightweight handling and strong mid-range power. Its oil change procedure is straightforward, but attention to detail ensures optimal engine life and performance.

Tools and Supplies Required

  • 17mm socket and ratchet or wrench
  • Oil drain pan
  • Grab an appropriately sized oil filler cap tool if needed (on some models, it may be a large hex)
  • Shop rags
  • Gloves (optional, but recommended for cleanliness)
  • Funnel
  • 0.60 US quarts (0.57 liters) of your preferred motorcycle transmission oil–JASO MA-rated 80W or 85W is recommended; do not use automatic transmission fluid (ATF)
  • Torque wrench
  • Replacement sealing washer for the drain bolt (crush washer, if needed)
  • A stand or lift to support the bike upright (a triangle-style stand works best)

Preparation

  • Support the Bike: Place your CR125 on a stable, flat surface and use a stand to keep it upright. This ensures all the old oil drains completely.
  • Warm the Oil: Start the bike and let it idle for a minute or two. This thins the oil, allowing more contaminants to drain out with it. Turn off the engine.
  • Gather Tools and Supplies: Lay out all your tools and supplies within easy reach.

Step-By-Step Oil Change Process

Step 1: Locate and Remove the Drain Plug

  • Place your oil drain pan beneath the engine.
  • Identify the large 17mm hex drain bolt on the right side of the engine, low on the engine case. This is your oil drain bolt.
  • Loosen and remove the drain bolt using your socket and ratchet or wrench. Let all the oil drain out into your pan. Be careful—the oil may still be warm.
  • Inspect the drain bolt and sealing washer. If the washer is crushed or damaged, replace it with a new one.

Step 2: Add Fresh Oil

  • Reinstall the drain bolt with a new sealing washer (if needed) and torque to 21 lbf·ft (29 N·m, 3.0 kgf·m).
  • Locate the oil filler cap–this is a large bolt on the right-side engine case, above the clutch cover.
  • Remove the filler cap and insert your funnel.
  • Pour in 0.60 US quarts (0.57 liters) of motorcycle transmission oil, using a JASO MA-rated 80W or 85W oil–check your manual or consult with a MotoSport.com specialist if in doubt. The Honda CR125 engine oil and transmission oil are separate–you are only changing the transmission oil.

Step 3: Check Oil Level (Optional, but Recommended)

  • Some later models have an oil check bolt, but the early CR125s (like the 1996 and 1999) do not feature this as standard. Adding the correct amount is the best method.
  • If your model has an oil check bolt, after filling, start the bike, let it idle a few minutes, then shut it off. Wipe the oil check bolt, remove it, and look for oil to start seeping out. If oil does not seep, add a little more until it does, then reinstall the check bolt and filler plug.
  • For 1996 models, just ensure you add exactly 0.60 quarts (0.57L).

Step 4: Clean Up and Final Checks

  • Wipe the drain and fill areas clean with a rag.
  • Recycle the old oil properly—never pour it down a drain or onto the ground.
  • Check for leaks around the drain and fill sites.
  • Start and idle the bike for a moment, then shut it off and do a final check for leaks.

1996 Honda CR125-Specific Notes and Call-Outs

  • Transmission Oil Only: The CR125 is a two-stroke; it uses fuel premix for engine lubrication. The oil change discussed here is for the transmission/clutch, which is separate and does not lubricate the top end.
  • No Oil Check Bolt: The 1996 (and most older) models do not have an oil check bolt. Adding the correct quantity is crucial. Overfilling can cause leaks and clutch disengagement issues.
  • Drain Bolt Sealing Washer: Always inspect the washer on the drain bolt. A failing or missing washer can cause leaks.
  • Warm Oil Drains Better: Always let the bike idle for a minute or two before draining. This ensures more contaminants are removed with the old oil.
  • Oil Type: Only use motorcycle-specific transmission oil. Do not use gear oil, engine oil, or ATF.
  • Torque Specs: Drain bolt torque is critical—under-tightening causes leaks, over-tightening strips the threads. Use a torque wrench and tighten to 21 lbf·ft (29 N·m, 3.0 kgf·m).
  • No Filter to Change: The CR125 does not have a replaceable oil filter.

Why This Matters for the 1996 Honda CR125

  • Regular oil changes extend clutch and transmission life, reduce wear, and maintain peak performance.
  • Using the correct oil and procedure prevents clutch slippage and premature wear.
  • Proper disposal of old oil is environmentally responsible—never dump it in the trash or on the ground.

MotoSport.com Recommendation

  • Always use quality transmission oil and MotoSport.com's genuine replacement parts for your Honda CR125. Our specialists are ready to help you select the right oil and parts for your specific bike.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 1996 Honda CR125 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.