How to Change the Oil in a 2013 Beta 350 RR: Step-by-Step Guide

Shop parts for a 2013 Beta 350 RR Dirt Bike!

The 2013 Beta 350 RR uses a split-lubrication system, requiring oil changes for both the engine and transmission. Following the correct procedure – and the recommended oil quantities – is crucial for reliable performance and longevity. Here is MotoSport's proprietary guide to help you get the job done right the first time.

Essential Tools & Supplies

  • 13mm and 8mm sockets or wrenches
  • Drain pan
  • Rags/shop towels
  • 750 ml of engine oil (10W-50 full synthetic recommended)
  • 750 ml of transmission oil (10W-50 full synthetic recommended)
  • New oil filter
  • New copper or aluminum crush washers (recommended for drain bolts)
  • Torque wrench

Step 1: Preparation

  • Let your bike idle for a few minutes to warm the oil for thorough drainage.
  • Turn off the bike, set it upright, and remove the skid plate (if installed) for easier access to the drain bolts.
  • Place your drain pan under the engine.

Step 2: Drain Engine & Transmission Oil

  • Remove the engine oil drain bolt (13mm) and allow the oil to fully drain.
  • Remove the transmission oil drain bolt (typically 13mm) and drain the transmission oil.

Step 3: Remove and Replace the Oil Filter

  • Remove both 8mm bolts securing the oil filter cover.
  • Remove the old oil filter and cover O-ring.
  • Install a new oil filter – open end facing inward, solid end toward the cover.
  • Install a new O-ring on the cover and reattach, tightening bolts to 10 Nm.

Step 4: Reinstall Drain Bolts

  • Clean and inspect both drain bolts. Replace the crush washers if necessary.
  • Reinstall the engine oil drain bolt and torque to 15 Nm.
  • Reinstall the transmission drain bolt and torque to 20 Nm.

Step 5: Refill Oils

  • Remove the engine oil fill cap and pour in 750 ml of fresh engine oil.
  • Remove the transmission oil fill cap and add 750 ml of fresh transmission oil.
  • Be precise with measurements—for this model, do not rely on the oil check bolt or sight glass for these fills. They can be misleading. Trust your measured quantity for both engine and transmission.

Step 6: Final Checks

  • Check for leaks around filters and drain bolts.
  • Reinstall the skid plate.
  • Start the bike and let it idle for two minutes. Shut off and wait briefly, then visually inspect for leaks once more.
  • You can check the engine oil window while the bike is running – it should show oil near the middle of the window (engine side only).

What Beta 350 RR Owners Should Know

  • This model has completely separate reservoirs for engine and transmission oils. Never mix up the drain bolts or oil types.
  • Always fill 750 ml per side. Beta's manual and the check/inspection port can cause underfilling; measured fill by volume is the proven method for long-term reliability and clutch life.
  • Replace O-rings for oil filter covers and filler caps at every change to prevent leaks and pressure loss.
  • The 350 RR's wet clutch requires frequent oil changes for optimal shifting and clutch feel, especially under aggressive riding or racing conditions.
  • If you find less than 750 ml draining out during oil changes, it's likely normal due to oil retention throughout the engine and transmission spaces. As long as you refill the correct measured amount, you are maintaining your bike correctly.

Regular oil changes are the most important maintenance task for your 2013 Beta 350 RR. Following these steps and using quality supplies will keep your Beta running strong in all conditions.

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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.