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Aug 19, 2026 at 2:06 AM #23379Bike Model = : GT250R EFI 2010Hello,
I recently bought a GT250R EFI 2010. It only has 2,500 km on it, but according to the previous owner, he only rode it occasionally to prevent it from deteriorating.After I got it, I changed the oil and the oil filter. Since this is my first motorcycle, I don’t know much about certain things, and I would like to know if there is anything specific I should pay attention to.It seems to be running normally for the most part, but sometimes it stalls when in neutral or at low RPMs in first and second gear. This problem doesn’t happen at high RPMs.What could I do, and what should I check before taking it out for a ride?

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Aug 19, 2026 at 10:05 AM #23380
Grab a bottle of something like WYNNS FORMULA GOLD PETROLĀ (search online) or similarĀ (but do NOT get REDEX),Ā just something like WYNNS Formula Gold PetrolĀ in your country.
Pour the whole thing inside the tankĀ (1 full bottle inside) , go for a ride until the fuel is low, you want this product to clean out your injectors, fuel lines, fuel pump (anything fuel related) that may have internal deposits / gunk and the pistons will burn it away.
See if the idle rpm improves.
– Check your tyres for cracksĀ (very old rubber is dangerous)
– Disconnect your calipers from the brake discs, and clean your calipers inside with brake cleaner (don’t remove the brake hoses)
– Also check your pads, if the brake pads are thin,Ā replace them.
– Check your sprockets for bad teeth or replace them
– The chain , if the chain is covered in rust or has tight spots in some places as you spin the wheel to check slackĀ (put bike in paddock stand),Ā replace the chain.Doing small things 1st above ^Ā Ā before dealing with anything major.Ā Ā If it is working normally, that is a good thing!
Oil = Motul 7100 is the best oil for these twins. It will thank you for itĀ (or Silkolene Pro 4 oil)
Tutorial below
[How to Tutorial] How to Change Oil & Oil Filter on Hyosung GV125 GV250 GT GT250R GT125R
2500 KM is quite young!
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Aug 20, 2026 at 2:20 AM #23388
<p data-path-to-node=”1″>Thank you so much for the guidance, I’ll do that to it.
I did some research to find products similar to “WYNNS Formula Gold Petrol” and found two that I believe will work great: “Motul Boost And Clean” and “Liqui Moly Injection Cleaner Reiniger”. Tomorrow I’ll start doing what you suggested. I hope it works out, I want to keep this bike in great condition.
I’ll keep you updated as I work on it.</p>
<p data-path-to-node=”2″>Once again, thank you so much for the help!</p>
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