How to change the oil in a 1998 Suzuki DR350 Dirt Bike

How to Change the Oil in a 1998 Suzuki DR350

Changing the oil in your 1998 Suzuki DR350 is an essential maintenance task that helps extend the life of your dirt bike's engine. The DR350 features a dry-sump system, which complicates the process slightly compared to wet-sump engines. Here's a step-by-step guide to help you through it. ### Tools and Materials Needed - 17 mm, 12 mm, 10 mm, and 19 mm wrenches or sockets - Oil drain pan - New oil filter - Oil filler cap - Gloves - Safety glasses - Rag - New oil (10W-40 motorcycle oil, about 2 quarts total) - New crush washer for the drain bolt ### Steps to Change the Oil #### 1. Warm Up the Engine Warm up the engine by taking the bike for a short ride. This helps the oil drain more easily. #### 2. Remove the Skid Plate If you plan to change all the oil, including the frame oil, you'll need to remove the skid plate. It's held in place by four 12 mm bolts. Removing it gives you better access to the oil drain bolts. #### 3. Drain the Engine Oil 1. Locate the Drain Bolt: Position the bike on a level surface over an oil drain pan. The drain bolt is located at the bottom of the engine crankcase.
2. Remove the Drain Bolt: Use a 14 mm socket to remove the drain bolt. Be prepared for the oil to start draining out.
3. Replace the Crush Washer: Once the oil has stopped dripping, replace the old crush washer with a new one and tighten the drain bolt securely. #### 4. Drain the Frame Oil 1. Locate the Frame Drain Bolt: The frame drain bolt is usually accessible without removing the skid plate but doing so can make it easier.
2. Remove the Frame Drain Bolt: Use a 12 mm socket to remove the bolt, allowing the oil in the frame to drain into the pan.
3. Replace the Frame Drain Bolt: Once the oil has stopped dripping, replace the bolt and tighten it securely. #### 5. Clean or Replace the Oil Screen 1. Remove the Oil Screen: The oil screen is located inside the frame and helps filter debris.
2. Clean or Replace: If the screen is dirty, clean it gently with a brush or replace it if necessary.
3. Reinstall the Screen: Ensure it's securely tightened. #### 6. Install the New Oil Filter 1. Remove the Old Filter: Use a filter wrench to remove the old oil filter.
2. Install the New Filter: Place a new filter on and hand tighten it. #### 7. Refill the Oil 1. Add New Oil: Use 10W-40 motorcycle oil. The DR350 requires about 2 quarts total.
2. Replace the Oil Filler Cap: Once the new oil is in, replace the oil filler cap. #### 8. Check the Oil Level 1. Start the Engine: Start the engine and let it run for a few minutes to circulate the new oil.
2. Check the Level: Use the oil dipstick to ensure the oil level is at the recommended mark. #### 9. Reassemble 1. Replace the Skid Plate: If you removed it, now is the time to put it back, securing it with the four 12 mm bolts.
2. Dispose of Used Oil: Properly dispose of the used oil and filter. ### Specific Call-Outs for the 1998 Suzuki DR350 - Dry-Sump System: Unlike wet-sump systems, the DR350 stores some of its oil in the frame. This requires careful planning and additional steps when changing the oil.
- Oil Screen: The oil screen in the frame is crucial for filtering debris. Ensure it's clean or replaced during oil changes.
- Skid Plate Removal: While not necessary for basic oil changes, removing the skid plate can make accessing the frame oil and screen easier. By following these steps carefully, you'll ensure your 1998 Suzuki DR350 remains in top condition. Always refer to your owner's manual for any specific recommendations or updates.

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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.