Pete

[Pete]

Thanks for the replies all,

My bad yes I changed the pilots to 17.5 as it feels like not enough fueling at 1/4 throttle so thought I’d give it a try (no change)

Mains are 92.5 front, 95 rear

Needle moved up or down I can’t remember to richen up the mid range

I did piss about with the air/fuel screws to try and determine if they would help however it didn’t work but originally they were both 1.5 turns out each (made a note just in case)

Your absolutely correct with the plugs as the bike is running rich now

I’ve done everything on your helpful list as this has been an issue for a while.

I’ll take everything back to stock and start from scratch.

The only thing is this problem has been since I picked up the bike and all carb setting were untouched and standard, nothing I’ve done has made any difference, no better or worse which baffles me.

I’ll pick up some new plugs anyway and report back soon, at least I can have the carbs off in 5 minutes as I’ve done it that many times  😡 lol.

[Pete]

I’d always say premium for any bike, I get better fuel economy and the bike feels more spritely throughout the rev ranges.

[Pete]

Sorry it took so long for an update, thanks again for all the above suggestions.

All fixed, below is what was required.

Carb had a sticky choke valve so was drawing more fuel than it was meant to, fixed and still running like crap.

Pilot jets 1 size up

Main jets 92.5 front, 95 rear

Moved needle 1 slot for mid range for more fuel.

Tested over a few weekends with plug chops and plugs are the perfect colour now.

So much for a plug and play exhaust system 🙂

Bikes never ran this good even when stock.

Now that it’s running perfectly i can work on enhancements.

 

[Pete]

You are an absolute Hyosung Guru 🙂 , thanks very much for the detailed reply , i’ll pop an order in soon 🙂 , have a good one

[Pete]

Thanks again for the quick reply,

I’ll give the coils a check at the weekend.

 

As for the plugs i swapped them out when i bought the bike along with a new filter, will need to check the colour now.

Bikes done 3k since new and unfortunately i have no history in terms of previous issues, it’s had difficulty since i got it.

I did notice the pilot jets were gummed up when i cleaned the carb so they are ok now.

The starter jets didnt get cleaned and you describe almost perfectly the issue i have, i’ll strip the carb at the weekend and report back, i may owe you a beer 🙂

 

Thanks again

 

[Pete]

Morning,

Thanks very much for your detailed reply, unfortunately almost everything on your list has been checked with the exception of the coils (both cylinders/plugs) are firing however i will check for a weak spark.

 

You mention the lines could be dirty which is something i didnt think about however after i gave the carb a good clean it didnt run any better and the settings are stock apart from the main jet replacement which wouldnt affect the running at 1/4 throttle.

 

Brand new battery has also been fitted and working as it should.

I’ll take the carb off again and have another look, always a possibility that there is gunk in the tank thats pulling through, as the bike is only 18 months old i’m at a loss 🙁

[Author]

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