How to Change the Oil in a 2019 Suzuki RMZ450: MotoSport.com Exclusive Guide

Shop parts for a 2019 Suzuki RMZ450 Dirt Bike.

Maintaining your 2019 Suzuki RMZ450 with regular oil changes is crucial for delivering peak dirt bike performance. This step-by-step blog will cover the exact tools, process, and specific model considerations for anyone looking to change the oil on this renowned motocross machine.

Tools and Materials Needed

  • 10mm socket or wrench (for the drain bolt)
  • 8mm socket or wrench (for side cover bolts)
  • Oil drain pan
  • New oil filter
  • Fresh engine oil (Consult owner's manual, typically 10W-40 or recommended grade, 1 quart is usually enough)
  • Funnel
  • Clean rags/paper towels
  • Gloves (optional but recommended)
  • Parts cleaner or brake cleaner (for any oil residue)
  • Torque wrench (for proper reassembly)
  • Pick or small flat screwdriver (for O-ring removal if needed)

Preparation

  • Start your engine and let it idle for 3–5 minutes to warm up the oil. This helps the oil drain quickly and thoroughly.
  • Turn off the bike, allow it to cool slightly so you can work safely, and place it on a stand for stability.
  • Lay out your tools and supplies.

Step-by-Step Oil Change Process

  1. Remove the Skid Plate (If Equipped)
    Some RMZ450s may have a skid plate that blocks access to the drain bolt—if so, remove it using your 8mm socket.
  2. Locate and Remove the Drain Bolt
    The oil drain bolt is on the underside of the engine and uses a 10mm wrench. Position your drain pan beneath it and remove the bolt. Allow oil to drain completely. Tip: There may be a second drain bolt or oil screen on the side of the engine that can also be removed for thorough draining.
  3. Remove and Replace the Oil Filter
    Use your 8mm socket to remove the two bolts securing the oil filter cover on the right side of the engine. Carefully remove the cover—some oil may drip out. Swap out the old oil filter for a new one. Be sure the O-ring on the cover is intact and in good condition; replace if worn or damaged.
  4. Clean and Reinstall the Drain Bolt
    Inspect and, if necessary, replace the crush washer on the drain bolt. Reinstall the bolt by hand to avoid cross-threading, then tighten with your torque wrench to the manufacturer's specification found in your owner's manual.
  5. Install the New Oil Filter
    Insert the new filter, ensuring proper orientation (check arrows or markings as shown in the service manual), and reinstall the cover. Tighten the bolts to the specified torque.
  6. Add Fresh Oil
    Remove the oil fill cap (usually on the right side of the engine). Using a funnel, pour in the recommended quantity and grade of oil (typically around 1 quart, but always consult your manual for precise volume). Replace and tighten the fill cap.
  7. Check Oil Level
    Start the engine and let it idle for another minute. Turn off the bike and wait a few minutes for the oil to settle, then check the oil level using the oil sight glass or dipstick. Top off as necessary, being careful not to overfill.
  8. Clean Up
    Wipe any spills and properly dispose of your used oil and filter at a recycling facility.

Model-Specific Tips and Call-Outs for 2019 Suzuki RMZ450

  • Oil Change Interval: For the 2019 RMZ450, Suzuki recommends changing the oil every 9–10 hours of riding, or after every 3–4 intense rides or races. Shorter intervals are safer for extreme riding conditions.
  • Oil Capacity: Always check your service manual for the correct oil capacity. Overfilling can impact performance, and underfilling can damage the engine.
  • Torque Specs: Use a torque wrench on all bolts related to the oil drain and filter cover. Overtightening can strip threads; undertightening can cause leaks.
  • Oil Filter Orientation: The oil filter installs only one way. Double-check orientation as specified; incorrect installation can restrict oil flow.
  • Draining Thoroughly: The 2019–on RMZ450 features an additional oil drain point on the crankcase's right side (look for a smaller bolt or screened oil strainer). Remove this for complete draining on oil changes.
  • Disposal: Always dispose of used oil and filters respectfully at a recycling center.

Final Thoughts

Keeping your 2019 Suzuki RMZ450's oil fresh will protect its high-performance engine and keep you riding more and wrenching less. For OEM-grade parts and racing lubricants, MotoSport.com offers everything you need for DIY dirt bike maintenance.

Remember: Consult your Suzuki RMZ450 (2019) service manual for specific torque values and additional notes related to your particular bike.

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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.