How to Change the Oil in a 1993 Suzuki DR350S

Shop parts for a 1993 Suzuki DR350S Dirt Bike.

Changing the oil in your 1993 Suzuki DR350S is a straightforward process that requires some basic tools and attention to detail. The DR350S uses a dry-sump system, meaning the oil is stored in the frame rather than in the engine itself. This guide will walk you through the steps to change the oil, replace the oil filter, and check the screen filter in the frame. ### Tools Needed - 17 mm socket wrench (for oil drain plug) - 12 mm socket wrench (for oil filter and frame drain plug) - 10 mm socket wrench (for skid plate bolts) - 19 mm socket wrench (for oil filter housing if needed) - New oil filter (compatible with Suzuki DR350S) - 10w40 motorcycle oil (approximately 2 quarts) - Funnel - New crush washer for oil drain plug - Gloves - Safety glasses ### Steps to Change the Oil 1. **Warm Up the Engine**: Before starting, ride your bike for a few minutes to warm up the engine. This helps the oil drain more easily. 2. **Remove the Skid Plate (Optional)**: The skid plate is held by four 12 mm bolts. Removing it provides access to the screen filter in the frame, which is recommended for a comprehensive oil change but not necessary for every change. 3. **Drain the Frame Oil**: - Use a 12 mm socket to remove the drain bolt on the frame. This will allow the oil to drain from the frame into a pan. - Replace the drain bolt once the oil has stopped dripping. 4. **Drain the Engine Oil**: - Locate the oil drain plug on the bottom of the engine. It typically requires a 17 mm socket. - Remove the plug, allowing the oil to drain into a pan. Be careful not to spill any oil on the ground. - Replace the drain plug with a new crush washer. 5. **Replace the Oil Filter**: - Use a 12 mm or 19 mm socket wrench to loosen and remove the oil filter. - Install a new oil filter, ensuring it is properly seated. 6. **Check the Screen Filter (Optional)**: If you removed the skid plate, now is the time to check the screen filter inside the frame. Clean or replace it if necessary. Be cautious as removing the filter can damage the O-ring. 7. **Refill with New Oil**: - Use approximately 2 quarts of 10w40 motorcycle oil for the engine and frame. - Fill the engine first, then check the oil level with the dipstick to ensure it's at the recommended level. 8. **Replace the Skid Plate (if removed)**: Put the skid plate back on with the four 12 mm bolts. 9. **Start and Check the Engine**: Start the engine and let it run for a few minutes. Turn off the engine and check the oil level again to ensure everything is functioning properly. ### Specific Call-Outs for the 1993 Suzuki DR350S - Dry-Sump System: The DR350S uses a dry-sump system, which means the oil is stored in the frame. This requires a slightly different approach to oil changes compared to wet-sump engines. - Screen Filter: The screen filter in the frame helps protect the engine by straining out particles. It's recommended to check and clean this filter periodically, but it may not be necessary for every oil change. - Oil Capacity: The bike typically requires about 2 quarts of oil for both the engine and the frame. By following these steps and considering the specific features of the 1993 Suzuki DR350S, you can ensure your bike runs smoothly and efficiently.

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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.