How to Change the Oil in a 2019 Beta 125 RR Race
Shop parts for a 2019 Beta 125 RR Race Dirt Bike!
Regular oil changes are critical to maintaining the high-performing 2019 Beta 125 RR Race. This two-stroke model features a single gear oil cavity separate from the engine, so proper procedure ensures maximum longevity and smooth shifting.
What Makes the 125 RR Race Unique?
- Transmission Oil Only: Unlike four-strokes, the 125 RR uses transmission (gear) oil, not engine oil. Standard two-stroke premix handles cylinder lubrication.
- Compact Engine Capacity: Gear oil capacity is approximately 690-720ml depending on service history–always ensure you do not overfill or underfill.
- Check and Fill Location: The check bolt is situated just behind the brake pedal spring on the right side. The fill cap is typically near your right boot.
Required Tools & Supplies
- 10mm and 19mm socket or wrench
- Drain pan
- Rag or paper towels for cleanup
- Plastic bottle with graduated marks (makes accurate measuring easier)
- Recommended gear oil: 10W-50 (consult your manual for specific brand preferences)
Step-by-Step Oil Change Guide
- Place the bike on a stand, ensuring it is perfectly upright and secure.
- Locate the gear oil drain plug (right side, under engine case – typically 19mm). Place your pan underneath.
- Remove the drain plug and allow all oil to drain completely.
– To speed draining, remove the filler cap near your right boot.
– Inspect the crush washer for damage and replace if needed. - Reinstall the drain plug and torque to spec (do not overtighten, as these cases are soft aluminum).
- Measure out 690–720ml (as specified by the manual)
– Pour fresh gear oil through the filler opening.
– Oil bottles with built-in spouts make the job cleaner. - Reinstall the filler cap securely.
- Optionally, use the oil level check bolt to verify correct fill:
– With bike upright, remove the check bolt (behind brake pedal return spring)
– Wait for a small stream of oil; reinstall bolt when it slows to a drip. - Wipe away any spills. Reinstall the skid plate if necessary.
Beta Maintenance Tips for 2019 125 RR Race Owners
- Gear oil quality heavily influences gearbox life. Change oil every 10–15 operating hours or after muddy/wet rides.
- Do not use mineral or engine oil in place of transmission oil—this can cause clutch slippage or premature wear.
- If shifting feels rough or clutch action changes, inspect for debris in oil and repeat the change sooner.
- This engine shares architecture with Yamaha YZF R125 and Husqvarna 125 4-strokes—double-check parts compatibility before ordering filters or gaskets.
- Always use a torque wrench for critical bolts; overtightening is a common cause of case damage.
Keeping your Beta 125 RR Race properly serviced guarantees peak performance the MotoSport way. Still have questions? Ask us anytime or explore our full selection of Beta parts and accessories. Happy 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.