How to Change the Oil in a 2025 Kawasaki KLX300SM — MotoSport.com Guide

Shop parts for a 2025 Kawasaki KLX300SM Dirt Bike.

Tools and Supplies Needed

  • 10mm and 17mm sockets or wrenches (for drain plug and oil cover bolts)
  • Oil filter (Kawasaki OEM part number: 52010-1053)
  • Engine oil (10W-40, 1.2 quarts/1.1 liters, JASO MA rated)
  • Oil catch pan
  • Funnel
  • Torque wrench (for precise tightening, if desired)
  • Clean shop rags
  • Gloves (optional, for cleanliness)

2025 KLX300SM Oil Change Steps

  • Warm up your bike. Let the engine run for 2–4 minutes so the oil thins out and drains more completely. Then, shut off the engine and place the bike upright on flat ground.
  • Remove the oil fill cap. (Left side of engine, black plastic cap.) This allows oil to drain faster and more completely.
  • Place your oil catch pan directly under the engine's oil drain bolt (bottom of engine case).
  • Loosen and remove the 17mm drain bolt. Be ready for a rush of warm oil. Allow all oil to drain. Inspect and clean the drain bolt. Check or replace the crush washer if deformed.
  • Remove the oil filter cover using a 10mm socket — three bolts. Carefully take off the cover and old oil filter. Note the orientation of the filter and the small spring; it must be reinstalled in the correct position when replacing the filter.
  • Install the new oil filter. Make sure the spring is properly seated in the center of the filter. The open end of the filter always faces out (toward the cover).
  • Reinstall the oil filter cover. Start all bolts by hand to avoid cross-threading. Torque to manufacturer spec if you have a torque wrench; otherwise, snug but do not overtighten.
  • Reinstall and tighten the drain bolt (check torque: approx. 22 ft-lb/30 Nm). Do not overtighten to avoid stripping the case threads.
  • Fill the crankcase with new oil. Add 1.2 quarts (1.1 liters) of JASO MA rated 10W-40 motorcycle oil through the fill hole. Use a funnel to avoid spills.
  • Reinstall the oil fill cap.
  • Start the engine and run for 2 minutes. Then shut off and check for leaks at the drain plug and the filter cover.
  • Check oil level. After waiting a minute for the oil to settle, check the sight glass (lower left engine case). Add a touch more oil if needed – the proper level is between the two markers on the glass when the bike is upright and not running.
  • Properly dispose of old oil and filter at a recycling center.

KLX300SM (2025) Model-Specific Advice

  • Oil Capacity: Do not overfill – the engine requires 1.2 quarts (1.1 liters) after complete draining with filter change. Overfilling can cause excess engine pressure and leaks.
    Source: Kawasaki service manual references from multiple owner guides.
  • Filter Spring Orientation: Always ensure the small spring is behind the oil filter before installing the filter cover, or you risk oil bypass and engine damage.
    Source: Confirmed by technicians and owner experience.
  • Tightening Sequence: Start all cover and plug bolts by hand; using a torque wrench is recommended, especially for the oil drain plug and cover (spec: approx. 22 ft-lb/30 Nm for drain). Kawasaki aluminum cases can strip easily.
  • Oil Brands: MotoSport recommends sticking with high-quality JASO MA or MA2-rated oil. Kawasaki, Motul, and Mobile One Racing 4T are owner favorites for these bikes.
  • Service Intervals: First change at 600 miles (1,000 km), then every 1,800–2,000 miles (3,000 km). Aggressive/race riders may wish to change oil more frequently after hard rides or heavy dust conditions.
  • Filter Part Number: Confirm you have filter part 52010-1053 or equivalent for 2025 and recent years.

Final MotoSport.com Tips

  • Oil changes are cheap insurance – fresh oil keeps your 2025 KLX300SM engine running cooler, quieter, and longer.
  • If your bike is under warranty or in the break-in period, always document the mileage and oil change service date for any future warranty claims.
  • Have a friend help keep the bike upright if you don’t have a center stand.
  • If you ride in especially dusty or wet conditions, consider reducing your interval between changes for optimal engine protection.

Ride On – from the team at MotoSport.com

Related Shopping Categories

Shop Motor Oil for a 2025 Kawasaki KLX300SM Dirt Bike.

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Shop Tools for a 2025 Kawasaki KLX300SM Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2025 Kawasaki KLX300SM 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.