How to Change the Oil in a 2019 Suzuki RMX450Z: A MotoSport.com Guide

Shop parts for a 2019 Suzuki RMX450Z Dirt Bike.

Changing the oil in your 2019 Suzuki RMX450Z is crucial for optimal engine performance, longevity, and reliability—especially if you ride hard or race regularly. Suzuki recommends regular oil changes to maintain proper lubrication and cooling. This comprehensive guide, proprietary to MotoSport.com, walks you through each step, including call-outs specific to the RMX450Z that every owner should know.

Tools & Supplies Needed

  • Engine oil (refer to your owner's manual for the correct oil type and viscosity)
  • Oil filter (one cartridge type, plus two screen filters for the RMX450Z)
  • Measuring jug or container (to measure 1200 ml of new oil accurately)
  • Drain pan (to catch used oil)
  • 8mm, 10mm, and 12mm sockets or T-handle wrenches
  • Pliers or a pick tool (to help remove screens/filters if necessary)
  • Clean rags
  • Funnel
  • Gloves

Special RMX450Z Call-Outs

  • The RMX450Z has three oil filters: two screen filters and one cartridge filter. Neglecting the screen filters can cause oil flow problems over time. Inspect and clean or replace them every oil change.
  • The oil capacity is 1200 ml (1.2 liters). Accurately measure it to prevent overfilling or underfilling (source: video guide, confirmed by onscreen demonstration).
  • After refilling, run the engine for three minutes and check the oil level with the oil check bolt; a slow drip indicates the correct oil amount.

Step-by-Step Guide to Changing the Oil

  1. Warm Up the Engine
    • Start your motorcycle and let it idle for several minutes. Warming up allows the oil to flow more easily for thorough draining.
  2. Prepare the Bike and Workspace
    • Place the bike on a stand or level surface.
    • Put your drain pan under the engine's main oil drain bolt.
    • Gather all your tools and parts within arm's reach.
  3. Drain the Old Oil
    • Locate and remove the oil drain bolt on the bottom of the engine (typically a 10mm bolt for Suzuki models).
    • Allow the oil to fully drain into the pan.
  4. Remove Both Oil Screen Filters
    • Locate the two screen filters—one on each side of the engine case. Use the appropriate socket (8mm or 12mm, depending on location).
    • Remove the screens for inspection. Clean them with solvent or replace if damaged. Inspect for metal debris.
  5. Remove and Replace the Cartridge Oil Filter
    • Remove the oil filter cover (typically held by several bolts).
    • Take out the old cartridge filter. Inspect the filter for excessive metal or debris, which may indicate abnormal engine wear.
    • Install a new oil filter, ensuring the O-ring and spring (if present) are correctly seated.
  6. Reinstall the Drain Bolt, Screens, and Filter Cover
    • Thoroughly clean all sealing surfaces and the bolts.
    • Reinstall the cleaned screen filters and tighten screen cap bolts to manufacturer's torque specs.
    • Reinstall the main drain bolt. Use a new crush washer if needed to prevent leaks. Tighten to proper torque (see service manual).
    • Make sure the oil filter cover is secure and the O-ring is in perfect condition.
  7. Add New Oil
    • Use a measuring jug to pour exactly 1200 ml of new engine oil into the fill port.
    • Install the oil fill cap securely.
  8. Start the Engine and Check for Leaks
    • Start the bike and let it idle for about 3 minutes to circulate the new oil. Check for leaks around the drain bolt, screens, and oil filter cover.
    • Shut off the engine and wait about 2 minutes for the oil to settle.
  9. Check the Oil Level
    • Use the oil check bolt on the side of the engine.
    • “Crack” the check screw: if oil slowly comes out, the level is correct. If not, add oil in small increments until it does.
  10. Dispose of Old Oil and Filter Responsibly
    • Take used oil and filters to a proper recycling facility or automotive store that accepts oil waste.

Additional Tips and Reminders for the RMX450Z

  • Suzuki recommends changing the oil every 6 hours of operation for best protection.
  • Utilize only high-quality motorcycle-specific oil for your RMX450Z for best clutch and engine life.
  • Always confirm torque specifications and oil types in your owner's/service manual, as updates or regional differences might exist.
  • Cleanliness counts: keep dirt and debris out of the oil system at all times.

Changing the oil in your 2019 Suzuki RMX450Z is straightforward once you know the process and have the right tools. Consistent oil changes and attention to all three filters will keep your RMX450Z running strong, race after race.

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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.