How to Change the Oil in a 2013 Beta 350 RS SM

Shop parts for a 2013 Beta 350 RS SM Dirt Bike!

Routine oil changes are essential to keep your 2013 Beta 350 RS SM running at peak performance. This guide walks you through every step, highlighting the specific requirements and helpful tips unique to your bike.

What Makes the 2013 Beta 350 RS SM Oil Change Unique?

The Beta 350 RS SM features separate oil chambers for the engine and transmission. Each requires an independent oil change, with care taken not to mix the two. Always use the quantity recommended by Betathis model is sensitive to overfilling or underfilling. The inspection and fill process is different from most bikes – follow the instructions below precisely to avoid common pitfalls.

Tools & Supplies You Need

  • 13mm socket or box wrench
  • 8mm socket (for oil filter cover)
  • Catch pan
  • Clean rags
  • New oil filter and o-rings
  • Engine oil: Fully synthetic 10W-50 (750ml for engine, 750ml for transmission)

Step-by-Step Oil Change Guide

  1. Warm the Engine
    Start the bike and let it idle for 2-3 minutes. Warm oil drains more thoroughly and suspends debris for better removal.
  2. Stabilize the Bike
    Place the bike upright on a level surface. Turn off the engine and let it cool slightly to avoid burns.
  3. Remove the Skid Plate (if equipped)
    This gives clear access to the drain bolts.
  4. Drain Engine Oil
    • Locate the engine drain bolt under the engine. Place the catch pan beneath.
    • Remove the drain bolt with a 13mm wrench. Let the oil drain completely.
    • While draining, loosen and remove the engine oil filler cap for improved flow.
  5. Drain Transmission Oil
    • Find the transmission drain bolt (usually adjacent, check manually for location).
    • Remove the bolt and let all oil drain into the pan.
    • Remove the transmission oil filler cap to help draining.
  6. Remove and Replace Oil Filter
    • Using the 8mm socket, remove the two bolts from the oil filter cover.
    • Take out the oil filter and old o-ring.
    • Install a new oil filter with the open end facing inward, and a new o-ring on the cover.
    • Reinstall the cover and tighten its bolts to 10 Nm.
  7. Inspect and Replace O-Rings
    Inspect the drain plug and filler plug o-rings for wear or damage. Always replace if necessary to avoid leaks.
  8. Reinstall Drain Bolts
    • Use new o-rings on both engine and transmission drain bolts.
    • Tighten the engine drain bolt to 15 Nm – do not overtighten.
    • Tighten the transmission drain bolt to 20 Nm.
  9. Add New Oil
    • Pour 750ml 10W-50 synthetic oil into the engine side using the engine filler cap.
    • Pour 750ml 10W-50 synthetic oil into the transmission side through its filler cap.
    • Do not rely on the inspection window or check plugs – use a graduated container for accuracy. Some manuals suggest checking plug levels, but on this Beta, this approach removes too much oil. Measure and trust your poured amount for best results.
  10. Check for Leaks & Final Checks
    • Wipe all surfaces clean.
    • Start the engine, idle for 2 minutes, and visually inspect for leaks at the drain plugs, filter cover, and filler caps.
    • If all is clear, reattach the skid plate. Your Beta is ready to ride.

Tips & Cautions for Beta 350 RS SM Owners

  • Unlike most dirt bikes, do not use the inspection window or oil check bolts to confirm oil quantity. Rely strictly on the measured pour–this model is known for misleading checks which can result in underfilling.
  • Changing both engine and transmission oil together extends component life and ensures smoother shifting.
  • Beta recommends oil changes every 15-30 hours of use, but change it more frequently if you ride hard or in dusty conditions.
  • Always use high-quality oil filters and o-rings compatible with your 2013 Beta 350 RS SM for maximum reliability.

Regular oil changes will keep your 2013 Beta 350 RS SM at its best–maintain accuracy with your measurements, and enjoy mile after mile of trouble-free riding.

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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.