How to Change the Oil in a 2020 Cobra CX50JR
Shop parts for a 2020 Cobra CX50JR Dirt Bike.
Performing a routine oil change on your 2020 Cobra CX50JR is essential for keeping your dirt bike’s engine running smoothly and extending its lifespan. This step-by-step guide, proprietary to MotoSport.com, covers everything you need to know—from the tools required to model-specific tips—so you can tackle this maintenance task with confidence.
Tools and Materials Needed
- Ratchet and socket set (with 8mm Allen socket or bit)
- Measuring cup (accurate to at least 300 ml)
- Long funnel (to reach fill hole)
- Cobra Venom 3 Shoe Clutch Milk (or manufacturer-approved transmission oil)
- Drain pan
- Clean rags or paper towels
- Gloves (optional, for cleanliness)
Step-by-Step Oil Change Procedure
-
Prepare Your Workspace
Park your Cobra CX50JR on a level surface, preferably on a stand, to ensure all oil drains completely. Make sure the engine is cool to avoid burns during the process.
-
Locate the Oil Drain Plug
Find the oil drain plug, typically located on the underside of the engine. Refer to your owner’s manual for the exact location and use the appropriate tool to loosen it. Place the drain pan underneath to catch the old oil.
-
Drain the Old Oil
Remove the drain plug and allow the old oil to flow out completely. Tipping the bike lightly side to side can help ensure all oil drains. While the oil drains, inspect the drain plug for debris or metal shavings, which could indicate a problem.
-
Replace the Drain Plug
Once all the oil has drained, clean the area around the drain hole, reinstall the plug, and tighten it securely. Avoid overtightening to prevent stripping the threads.
-
Prepare the New Oil
Pour 300 cc (10 oz) of Cobra Venom 3 Shoe Clutch Milk transmission oil into your measuring cup. This is the manufacturer-recommended quantity for your 2020 CX50JR. Never exceed 350 cc, as overfilling can lead to clutch slippage or other issues.
-
Refill the Transmission
Locate the oil fill port, typically on the side of the engine case just above the drain plug. Insert the funnel and pour the new oil directly into the fill hole until the correct amount is added. If necessary, gently kick the starter a few times to help oil distribute through the system.
-
Clean Up and Inspect
Wipe away any spilled oil and double-check that both the drain and fill plugs are secure. Dispose of the old oil properly at a recycling facility.
2020 Cobra CX50JR-Specific Call-Outs
- Correct Oil Type: Always use Cobra Venom 3 Shoe Clutch Milk or an equivalent high-quality, wet clutch-compatible oil. Do not use standard automotive motor oil, as it can damage the clutch plates.
- Oil Quantity: The 2020 CX50JR requires exactly 300 cc (10 oz) of transmission oil. Do not exceed this amount; overfilling can cause clutch slippage and poor performance.
- Frequency: Cobra recommends changing the transmission oil every two hours of riding time, or after every ride if conditions are muddy or wet, as moisture and debris can contaminate the oil quickly.
- No Oil Filter: The CX50JR does not have a replaceable oil filter. Routine oil changes and using quality oil are your primary maintenance steps for the transmission.
- Maintenance Record: Keep a log of oil changes and any other maintenance performed. This helps ensure your dirt bike stays in peak condition and can be useful for resale value.
- Aftermarket Fluids: If you choose to use an aftermarket fluid (such as AMSOIL), confirm that it is specifically labeled for use in wet-clutch, small-bore dirt bikes. Never overfill–always go by the volume specified in the owner’s manual, not just the dipstick or fill-hole level (the CX50JR does not use a dipstick).
Frequently Asked Questions
How often should I change the oil on my 2020 Cobra CX50JR?
Change the oil every two hours of riding, or after every ride in wet or muddy conditions.
Can I use automotive motor oil?
No, only use oil specifically designed for wet-clutch, two-stroke dirt bike transmissions. Automotive oils may contain friction modifiers harmful to your clutch.
What happens if I overfill the transmission?
Overfilling can lead to clutch slippage, poor shifting, and potential leaks. Stick strictly to 300 cc (10 oz).
Where can I get Cobra-approved oil?
MotoSport.com stocks Cobra Venom 3 Shoe Clutch Milk and other compatible oils designed for small-bore Cobra dirt bikes.
Final Tips for 2020 Cobra CX50JR Owners
Regular oil changes are one of the most important maintenance tasks you can perform on your CX50JR. Use only the recommended oil, follow the correct quantity, and keep to the maintenance schedule. This ensures your bike remains reliable, performs its best, and lasts for years of riding enjoyment.
For OEM parts, lubricants, and accessories, trust MotoSport.com—your source for everything Cobra dirt bike.
Related Shopping Categories
Shop Motor Oil for a 2020 Cobra CX50JR Dirt Bike.
Shop Oil Filters for a 2020 Cobra CX50JR Dirt Bike.
Shop Oil Drain Pans for a 2020 Cobra CX50JR Dirt Bike.
Shop Tools for a 2020 Cobra CX50JR Dirt Bike.
Shop Oil Fillers and Drain Plugs for a 2020 Cobra CX50JR 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.