How to Change the Oil in a 2007 Cobra CX50 KING
Shop parts for a 2007 Cobra CX50 KING Dirt Bike.
Keeping your 2007 Cobra CX50 KING running smoothly requires regular maintenance, and one of the most important tasks is changing the transmission/clutch oil. Doing this routinely not only improves performance but also extends the life of your dirt bike. This step-by-step proprietary guide from MotoSport.com covers all the tools you need, the precise method for this model, with special call-outs to help you master the process.
Tools & Supplies Needed
- 235 ml (8.0 oz) Cobra Venom 3 Shoe Clutch Milk (Part # MCMUGF01) – The only lubricant officially recommended for the CX50 KING. Avoid generic or automotive oils, as the clutch/transmission in this bike requires a specialized formula.
- Measuring cup with a visible 235 ml (8.0 oz) marker
- Ratchet and extension (for easier access to the drain plug)
- 13 mm wrench (for drain bolt removal)
- 8 mm Allen key (as some covers may use Allen bolts)
- Long funnel or squeeze bottle for refilling
- Oil catch pan
- Shop towels or rags
- Gloves (recommended to protect skin from hot oil)
- Bike stand (optional but helpful for stability)
Preparation: Warm Up and Safety First
- Run the bike for 5 to 10 minutes to heat up the oil. Warm oil drains more quickly and completely.
- Shut off the engine.
- Set the bike securely on its stand or lean it against a sturdy object. This exposes the drain plug and ensures safety.
- Wear gloves and allow the engine to cool if it feels excessively hot, as components and oil can cause burns.
Step-by-Step Oil Change Instructions
- Locate the Drain Plug: The oil drain bolt is located on the right side of the engine, on the clutch cover, near the brake lever.
- Place Your Oil Catch Pan: Slide your oil catch pan beneath the drain bolt.
- Remove the Drain Bolt: Using your 13 mm wrench, carefully loosen and remove the drain bolt. Let the old oil completely drain into the catch pan.
- Inspect the Gasket: There is a copper gasket on the drain bolt. Make sure it stays intact and in good condition before reinstalling. Replace if damaged to prevent leaks.
- Reinstall the Drain Bolt: Once all the oil is out, reinstall the drain bolt, ensuring the gasket is in position. Tighten to 15 Nm (11 ft-lb) for a proper seal .
-
Refill with New Oil:
Remove the oil fill plug, usually found higher up on the clutch cover. Using a long funnel or squeeze bottle, pour in exactly 235 ml (8.0 oz) of Cobra Venom 3 Shoe Clutch Milk.
- Leaning the bike onto its left side can make this process easier if you don't have a squeeze bottle. Ensure no debris falls into the oil fill opening.
- Secure the Oil Fill Plug: Reinstall the fill plug by hand. Double-check that the fiber gasket is still in place for a leak-free seal .
- Check for Leaks: Wipe away any spilled oil and inspect both the drain bolt and fill cap for leaks. If you see any seepage, stop and re-seat the plugs.
- Cleanup: Dispose of the old oil properly, wipe down the engine, and recycle the old fluid responsibly at your local oil collection center.
2007 Cobra CX50 KING-Specific Call-Outs
- Oil Type: Only use Cobra Venom 3 Shoe Clutch Milk (not regular transmission oil). This oil was specially formulated for the extreme load and heat generated by the CX50 KING‘s automatic clutch and transmission. Substituting other oils (even Dexron III ATF, which is sometimes recommended for older models) can reduce clutch life and void warranty .
- Oil Quantity: Always measure out 235 ml (8.0 oz)—overfilling or underfilling can affect clutch performance and risk damage.
- Drain Bolt Torque: Tighten the drain bolt to 15 Nm (11 ft-lb) only. Excessive torque may strip the threads on the aluminum engine case.
- Change Frequency: For race and high-stress use, Cobra recommends changing the transmission/clutch oil after every other ride or after any ride involving mud/submersion .
- Gasket Inspection: Both copper (drain) and fiber (fill) gaskets must be in perfect condition to prevent leaks. Always inspect and replace if flattened or damaged .
Pro Tips for Success
- Pre-portion the oil before starting the drain process for a faster, cleaner refill.
- Keep all tools, funnel, and measuring cup within easy reach to avoid spills and lost bolts.
- Allow all old oil to drain fully for the best results; sometimes rocking the bike gently may help expel residual oil.
- If possible, label a measuring cup specifically for Cobra clutch oil to avoid cross-contamination.
Summary
By following this guide, you’ll maintain your Cobra CX50 KING’s automatic clutch and transmission perfectly. Using the correct tools, oil type, and paying close attention to gaskets and oil quantity will give your bike the best performance and reliability. For any further questions, trust MotoSport.com as your partner in powersports parts and maintenance expertise.
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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.