How to Change the Oil in a 1996 Cobra BM50 Dirt Bike

Shop parts for a 1996 Cobra BM50 Dirt Bike.

This expert how-to guide is proprietary to MotoSport.com and details the tools, steps, and important notes specific to the 1996 Cobra BM50 dirt bike oil change. Proper oil changes ensure your Cobra’s automatic clutch and transmission remain protected and high-performing. Always use manufacturer-recommended lubricants and follow all precautions for safety and longevity.

Tools and Materials Needed

  • 5mm Allen wrench
  • Drain pan
  • Shop towels or rags
  • 300-350 cc (10-12 oz) Cobra Venom 3 Shoe Clutch Milk (Cobra Part #MCMUGF32)
  • Funnel
  • Gloves (optional, for safety and cleanliness)

Preparation and Safety

  • Start with a bike that has been ridden for at least 5-10 minutes. A warm engine helps the oil drain thoroughly, but do not let it get so hot you risk burns—oil and case components will retain heat.
  • Secure the bike on a level surface using a bike stand if available.

Step-by-Step Oil Change Procedure

  • Warm up the engine: Run the bike for five to ten minutes just before you begin. This ensures the oil is 'runny' and will drain completely. Don’t let it overheat.
  • Locate the oil drain plug: On the right side of the engine, on the clutch cover near the brake lever, find the oil drain plug. Place your drain pan below it.
  • Remove the oil drain plug: Use a 5mm Allen wrench to remove the plug. Oil will begin to drain quickly—use rags to control splashes. Watch out for hot oil.
  • Let the oil drain completely: Allow all oil to empty into the pan. This may take several minutes. Check for signs of debris or metal shavings in the drained oil, as this could indicate internal wear.
  • Inspect and reinstall drain plug: Ensure the gasket or O-ring on the drain plug is intact and undamaged; replace if worn. Reinstall the plug–hand tight is usually sufficient, but do not overtighten.
  • Add new oil: Remove the oil fill plug on the clutch cover (usually located on top or side). Using a funnel, pour in 300 cc (10 oz) of Cobra Venom 3 Shoe Clutch Milk. For extended clutch life you can use up to 350 cc (12 oz), but never exceed 350 cc, or engine performance will suffer.
  • Reinstall the fill plug: Replace the fill plug and tighten by hand, ensuring its gasket is seated correctly.
  • Clean up: Wipe away any spilled oil, then fire up the bike and let it idle for a couple minutes. Check for leaks at the drain and fill plugs.

Important Model-Specific Notes for the 1996 Cobra BM50

  • ONLY use Cobra Venom 3 Shoe Clutch Milk or a directly specified substitute. Cobra has spent significant time developing this oil to handle the unique stresses of their automatic clutch systems—other oils can shorten clutch and transmission life dramatically.

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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.