[Tutorial] How to Change Oil & Filter on Hyosung GV + GT125/250 +R
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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! 🤺
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Cheers Marcel Helpful guide for a beginner mechanic like me, any chance you could post more servicing tutorials like these?
I did a few including pipes, fueling, carb jetting, side mod , clutch, and im welcome to ideas ofcourse ,i got other drafts, i just make sure i do them in plain english for all to follow 😉 ,
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