How to Change the Oil in a 2026 Beta 350 RS: A MotoSport Guide
Shop parts for a 2026 Beta 350 RS Dirt Bike!
Regular oil changes are essential for ensuring your 2026 Beta 350 RS delivers peak performance on every ride. While the process is straightforward, the unique split-lube system, specific oil volumes, and required steps separate this Beta model from other dirt bikes. This MotoSport-exclusive guide provides clear, actionable steps tailored for your bike–and highlights key tips every 350 RS owner should know.
What Makes the 350 RS Unique?
- Twin oil sump design: The engine and transmission use separate oil circuits, so you’ll be draining and refilling both.
- Precise oil capacities: The 2026 model follows Beta’s dual-side-fill concept, requiring roughly 750 ml in both the engine & transmission, depending on the latest recommendations.
- Oil level verification: The engine side uses a sight glass, while the transmission is checked with a fill bolt instead of a dipstick or sight glass.
Tools & Supplies You Need
- 8 mm and 13 mm sockets (oil filter cover, drain bolts)
- Drain pan
- New oil filter and specified o-rings
- Beta-recommended 10W-50 oil (1.5L covers both sides)
- Torque wrench (10 Nm for filter cover, 15 Nm engine drain bolt, 20 Nm transmission drain bolt)
- Funnel or oil filling syringe
- Shop towels for cleanup
Oil Change Process: Step-by-Step
- Remove the skid plate (if equipped) to access drain bolts.
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Drain engine oil:
- Locate the engine oil drain bolt (13 mm).
- With a pan ready, remove the bolt and let the oil drain completely.
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Remove the oil filter cover:
- Take out the two 8 mm bolts.
- Remove the cover, old oil filter, and o-ring. Allow excess oil to drain.
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Drain transmission oil:
- Remove the transmission drain bolt and allow all fluid to drain.
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Install new filter & o-rings:
- Insert a fresh oil filter (open end toward engine), new o-rings on filter cover, engine, and transmission drain bolts.
- Reinstall the bolts. Tighten the filter cover to 10 Nm, engine drain bolt to 15 Nm, transmission drain bolt to 20 Nm.
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Refill with oil:
- Add 750 ml of 10W-50 oil to both the engine and transmission fill ports.
- Install new o-rings on the filler caps before securing them.
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Oil level confirmation:
- Engine: Start bike, let idle for two minutes, then check that the oil is in the middle of the sight glass while running.
- Transmission: After shutdown, use the fill/check bolt – the oil should be at the bottom of the bolt threads.
Pro Tips for 2026 Beta 350 RS Owners
- Do not overfill: More is not better. Excess oil can cause foaming and pressure issues.
- Sight glass check: Only check the engine side when the bike is running; results will be inaccurate otherwise.
- No dipstick on transmission: Trust the specified volume (750 ml) and the fill/check bolt method.
- Stick to the maintenance interval: Aggressive riding or harsh conditions? Shorten the service window for best results.
- Always confirm O-ring placement: Reused or damaged o-rings are a leak risk.
Final Thoughts
A proper oil change on your 2026 Beta 350 RS means smooth shifting, cooler running, and maximum engine life. Always confirm oil specs against your owner’s manual for the most current Beta guidance. Shop MotoSport’s full selection of Beta-approved parts & lubricants to keep your bike at its best on every ride!
Related Shopping Categories
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Shop Oil Fillers and Drain Plugs for a 2026 Beta 350 RS 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.