Remi
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Update:
Got the bike serviced, got a new oil filter and replaced spark plugs and she’s running as good as new.
I’m guessing the spark plugs were just worn out/dirty? I did ride the bike between London and Brighton, both ways in the same day, meaning I was on full throttle for a while😄 I read that may not be too good for the bike. It was the day the issue started to become more prominent.
Will keep observing👀
Because the Dutch finally visited a witch coven and invited them to their labour to make a “wicked” potion to make our 2 wheeled kittys purr more! Believe me, that juice is worth the squeeze! I haven’t tried anything else better since then. I hope Wynns stays in business as i use them on customer bikes lol
hahahah amazing
Hi all,
Thanks for all the insights. I saw on another thread that Wynn’s Formula Gold petrol fluid helps with the revs being unstable. I tried it and it worked very well!! Currently minimal misfires but still does sometimes.
Able to enjoy riding again until I get it properly serviced👍🏼👍🏼👍🏼
Any ideas why the fluid worked is also helpful😅
Cheers!
Here is a link to a longer version of the video, so both Android and iOS users can fully appreciate the spluttering😅
Hi Marcel! Thanks for the response.
1. No mods have been done
2. Only thing that’s been done at mechanics is changing oil and topping up coolant as well as the recommended services according to mileage. At the moment, second service done.
3. The bike is 2022, and I bought it second handed in May, 2023! Air filters have not been replaced.
4. I use E5, unleaded usually from shell or esso.
5. Will have to get back to you on the spark plugs..
6. I haven’t seen any sparks, but I can check again!
7. In terms of invasion, it is indeed quite rainy and windy now and I don’t have indoor parking, although I always use a cover. However, 2 weeks ago the bike did tip over due to winds, but I didn’t see any external damage except for a significant dent on the gas tank, as you will see in the video! After that incident, the “hiccups” did seem to be a bit more noticeable, so it could play a role.
thanks for re-uploading the video, and good job with the web app😆😆💪🏼
Sorry to forget to add when I chase coolant leaks (I rebuild a fair number of the good old water cooled 2 strokes for people) I use a UV dye added to the coolant & a UV light which then shows up cracks, leaks etc.
Nice! I’ll keep that in mind, as well as what you mentioned in the previous message.
Thanks for the help🙏🏼
First of all welcome! Do not worry, it is not dead. The bike is still alive, since it is only 1900 miles, it is still a baby.
- Did the owner send service reciepts of 600 miles, 1,00 miles because at 600 miles = Warranty allows Korea to replace any faulty parts for free such as strange cooling system issues , or investigate metal shavings
- At 1,000 miles, the service dealer must open the engine valves and adjust them (Valve Clearance is a requirement from Korea at 600-1000 miles to make sure the valves are okay since brand new === metal shavings will also be “new parts talking to each other inside the motor” and old shavings are normal. After oil change, future metal shavings will normally be clutch plates.
- If piston has a problem , yes you will see lot of smoke and low compression and it will eat oil very fast.
- Coolant = Any service history reciepts showing this “Water pump flush, water coolant checked , radiator removed & checked for leak test” ?
The liquid cooled vtwin 125cc is the first for Hyosung because all 125cc were using OIL COOLER, they got very very hot! = So Hyosung switch to water cooling to help 125cc cool down more , as it is a v-twin! it would make more heat naturally than a single piston 125 LC motor. As long as bike is not dead , it has life, do not worry!
Thanks a lot for your detailed response, Marcel!
In terms of servicing, the bike was serviced on 600 miles, and the last service was at 1657.
Both services included all the usuals, and in terms of Valve Clearance and Coolant Reservoir, both were inspected but nothing done to them! I.e., the dealer must’ve felt that they were fine. There is no evidence of Valve Clearence being adjusted.
Next service is due at 2500 miles!
