Hyosung GT125R carbs peoblem
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Bike Model = : Hyosung Gt125R
Hi, I have a slight problem, my carbs died, leaked entire fuel tank into the engine, i would like to change carbs for a different ones. Did anyone find some sort of carb that fits our bikes ? Or am I stuck with looking for used Gt/Gv carbs which have literally no availability when it comes to rebuild kits in PL ?
Any help appreciated
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Send me an email (click “CONTACT” at the bottom of this website) , we will send you any part your carb requires or browse the HyoRiders Shop.
Also, the BDS26 is a GOOD carb and its still a japanese carb, you will need to rebuild it , as sometimes previous owners may have left the bike standing for too long (years) and no love was given to it. So it makes sense to rebuild it, even replacing the floats help.
Now, remove the fuel hose from your TANK , does fuel come out ? == Replace the tap. If engine turns off , the tank tap must turn off automatically, this is the 1st defence it stopping fuel overflowing your carb float needles.
If you connect the tank tap to the PUMP on the frame ==== Turn engine off , point the fuel pump in a bucket , does fuel come out ? = Replace the pump too! This is 2nd defence.
Also damaged taps / pumps will leak fuel 100% through their Vacuum lines too. (Their diaphragms have burst causing fuel to leak on both ends. etc)
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d entire fuel tank into the engine
I serviced my carbs and replaced most of the jets & gaskets. Spray it all clean with Carby Cleaner & replace as many of the parts as possible. A carby repair kit won’t cost much. HEAT the Screws abd JETS before removing them so the brass doesn’t break. It’s fairly easy job & should improve your carbs. If not you should try to find WRECKED Hyosung with the same carbys. I’ve got 2x carbs & serviced both. You can get a new dual carb from Hyosung but costs almost as much as the bike. I alos found a similar dual carby that is the same size but has it’s throttle on the other side. I intend to see if i can move the throttle cable across to make this carby work, but it may not be that safe. It is for the Honda Rebel 250. The dimensions are the same so it will fit but i’ve not tested it yet. It is a very cheap priced aftermarket carburettor but it looks ok in quality. Cost me only $35 quid. But your best bet is to find a used Hyosung Mikuni carb & service it, if your own carby does not come good after a clean. They are MECAHNICAL so parts can be replaced to make them work again. My guess is your FLOAT NEEDLE is not sealing off the fuel correctly. Perhaps it’s O-Ring has failed. It is a cheap and easy part to replace. You don’t have to get the Mikuni parts to test if you can save your carby. replace the bits you can & spray the hell out of eeryhting in there. You can also get CARB JET FILES which are just peices of wire you poke in the holes of the jets to clean them. A strong Carby Cleaner spray can should do most of the cleaning for you. Marcel has some guides on removing the carbs and opeing them up and tricks like adding a bit of vasleine to the gasket and the diaphram to create a good seal, etc. If you have trouble removing a part or finding replacemet parts, you can contact me.
Hyosung BDS26 Dual Carburetor :
Aftermarket PD26JS Dual Carburettor for HONDA Rebel 250:
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The Honda Rebel-carbs must stay horisontal….
Old and grumpy,(?), have fairly wide engine & tuning experience, "restoring/resto-mod" on cars & mc, worked as electronic tech. (retired).
GT125R - sold. New (used): 2012-GT250R-efi (sold)+ 2017-GV-125C (sold) - got my old 2018-GT-125R back... 🙂
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The Honda Rebel-carbs must stay horisontal….
Alas that’s the downside!
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Well to be fair I don’t really know what got messed up and I lack mechanical knowledge and skills to do carb rebuild, I got it to a mechanic and he failed miserably to do anything with them. First it was driving normally, left it in the garage and two days later I had huge gas stain around the bike.
Entire tank of gas just went straight through the carbs and onto + into the engine…
I bought some AliExpress rebuild kit because I thought it’s only main seal issue and stuck floats. Gave it to someone (bike could start, drive, acted like it didn’t get enough fuel and leaked) and now bike will start but even slight throttle move will stall it
Problem is most of mechanics will just tell me “sorry, not touching V Hyosung bikes” or tell me they won’t touch the carbs without OEM rebuild kit which is literally impossible to get in Poland
That’s why I even tried to look which other bikes use bds26 or “bds-like” carbs that would fit my bike so that I can get it to work and then rebuild my old carbs on my own
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I will send you a link to a carb kit & guide on how to install the bits. It can be easy but apply heat to the brass parts before your undo them .. heat the carbs all over thats what i do. Very hot. A bit too hot to touch, not too hot you cook the orings inside. Ultrasonic clean will cost too much but is a good alternative IF they look after you carbs. Can of Carb Cleaner, some tools, a table, a chair, some parts & you can make them better.
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syazel, i tried to send you a personal message, not sure if this site allows it. I’m not going to put the link to the carb parts here, i don’t think Marcel will like it. What i am going to do is post pictures of 2x carb kits available now. I think you will need DIAPHRAMS & possibly the FLOATS, although it’s best to keep the ORIGINAL FLOATS if they haven’t been messed with as they will be set at the right height. Sugest you buy the flaots anyway just in case. Some kits come with needles but you should be able to clean up your old needles. Try to get a Carb Kit that looks like these:
You can easily put all these new parts into your carbies, except the long, thin, pointed part with the fat screw thread on the top of it. This is the mixture screw but it is SET BY FACTORY and you shouldn’t need to touch it. To get to it, you have to DRILL it out. I never needed to touch it. All my satisfaction came from the other parts. I especially like the big golden cylinder. It has a ACORN HEADED SCREW on top and it just slides out. Your needle slides in and out of this and it’s a good idea to swap it for new one. The FLOAT SEAT has an O-ring around it and a filter screen. I am sure you need a new one of those on each carb. The FLOAT NEEDLE drops into it. This little needle has a button on top of it with a spring inside. I am pretty sure your springs will not be springey anymore. The first kit is the one i suggest you buy. I have a link to a picture tutorial on how to service these Hyosung Dual Carbs & will post it here when i find it. There are MANY carb kits where you shop but make sure you get one that looks like my photos – they are a bit more complete than most kits. You can do this job if you can undo screws & you are not heavy handed. Be carefiul undoing the ACRON SREW it likes to break – it’s thread is small & it’s BRASS so it’s brittle. HEAT the CARBYS really well before you start the job. Heat the silver meatal around the screws & heat the screws too. Mostly make the carby HOSUING hot so the heat expands the casing and allows the screws to undo easily without breakage. Marcel has some good guides here & i will upload a full photo walkthrough for you. If you can’t fix the carby with this kit you WON’T have lost much cash. If you ultrasound the carbs you will lose cash as you’ll still need to replace all those bits. They have to take carb apart to clean it & they may wreck it in the process. What do they care? I’d also look for a used Carby from a wrecked Hyosung too, if i couldn’t repair mine. Once you’ve done the job, you’ll realise it’s easy & is better done by somone who gives a sht about the carby. You got this, mate.
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You can remove the carbs and get someone to do an ultrasonic clean. Then slowly put the parts together , at least this will be a good learning curve for you , not to trust those mechanics again.
Here in UK 80% of garages do not want to touch Hyosung bikes (but it uses Japan carbs like Suzuki does) , it does not make sense lol.
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Gave it to someone (bike could start, drive, acted like it didn’t get enough fuel and leaked) and now bike will start but even slight throttle move will stall it Problem is most of mechanics will just tell me “sorry, not touching V Hyosung bikes” or tell me they won’t touch the carbs without OEM rebuild kit which is literally impossible to get in Poland That’s why I even tried to look which other bikes use bds26 or “bds-like” carbs that would fit my bike so that I can get it to work and then rebuild my old carbs on my own
Mate, can you tell me exactly who you gave your carburettors to for repair? Because it would be funny if we’re talking about the same person 😀
I sent mine (by post) last winter for reconditioning, and the guy took care of everything + adjustments based on the modifications made to them (he got the adjustment right in 90% of cases).
For complete reconditioning + cleaning, replacement of fuel strainers, needle springs, gaskets and nozzles, I paid 550 PLN, I think.
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