[How to Tutorial] How to Change Oil & Oil Filter on Hyosung GV125 GV250 GT GT250R GT125R
Time for an oil change? …One of the crucial things to stay on top of!
This short tutorial shows you how to change your oil with ease on the 125/250 twins (2001-2018) and also the filter!
This applies to: GV125 (01-2018) / GV250 (upto 2018) / GT & GTR 125 (03-2018) including GT250+R.
Personally, one of my other twins gets its oil changed every 1,000-1500 miles using Ester oils. Manual suggests longer intervals, but I prefer premium oil (JASO MA2, Ester good) every 1500 miles max. 🏍️
Moving on, let’s prepare the parts & tools first…
| Oil – 2x 1L Bottles (Bike needs 1.5L total) |
Oil Filter & O-Rings (don’t skip filters!) |
Drain Pan/Bucket (3L+ capacity) |
| Torque Wrench (too crucial, you’ll see why below ⏬) |
Size 15/17mm Socket (12 sided, NO SPANNER) |
Size 10mm Socket / Driver |
Plus these bits also: Pliers | Funnel | Gloves | Clean rags | Measuring jug
1. Undo your filler cap first!
For stock caps, use pliers (anti-clockwise). For custom CNC Caps, use 19/21mm socket.
2. Go under engine & loosen the drain plug
For GTR owners, use a bar extension or remove fairings. ⚠ Be slow to prevent the plug falling into the bucket!
3. About those drain plugs…
Roads are salty; stock plugs can seize. Use a coloured, weather-resistant magnetic plug to avoid issues. Available here.
4. Finished draining? Close the drain-hole!
Clean under the engine, use torque wrench max 15ft lbs. ⛔ DO NOT OVERTIGHTEN THIS BOLT.
5. Go to your oil filter cover next!
Undo the 3 nuts holding the cover. ⚠ Oil WILL fall out; place a rag/pan underneath. Wear gloves. Dispose old filter.
6. Filter Cover Inspection & O-Ring Change (Pt.1)
Clean the cover, check spring, replace big O-ring (dress in oil first ⛔).
7. O-Ring Change (Part2)
Replace the O-ring at the back inside the filter area. ⚠ Use a small hook, don’t force. CHANGE THE OLD O-RING TO A FRESH ONE.
8. Next, your new oil filter goes in!
Ensure the hole of the filter goes inside the engine as shown.
9. Close the filter cover!
Tighten nuts to 6 ft lbs max. 🚦 Ensure the cover O-ring is oiled.
10. Done? Grab your oil (& measuring jug!)
Pour 1.5L (1500ml). Not less, not more 😉 No jug? Use bottle markers.
11. Get your Funnel and pour the oil in…
12. Close the oil filler cap!
Ensure cap and O-ring are clean and undamaged.
🚦 Complete – Idle for 60 seconds & turn off!
Check sight glass, top-up if needed, and ensure drain plug is secure.
Tidy up & Go ride. 🏁
Questions? Fire away in the comments! 🤺