Look what I found in China
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Bike Model = : GV250 GT250
While having a swan around Chinese wholesale I found this. They have cloned the Hyo 250 engine, they are made by Yinxiang and also come in a 350cc variety. I have started a chat about parts and whole engine costs so hopefully they will be helpful. Yes we know China stuff can be bad, but I already know the cylinders and top end are interchangeable. I will keep you posted if I learn more. It could solve the hyo parts issues we all encounter. I have asked expressly about the manifolds as they look to be GV not GT – GT replicas are now available, but appear to have some fitment issues (not from Yinxiang). The engine codes are 250cc – 2V57FMM, and 350cc 2V67FMM.
Yes it does have the oil cooler, it is just cropped from photo.
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Hyosung has used a few chinese companies to replicate their older GV engines + Parts for the Asia market, so you will find the updated chinese/korean engine updated as “GV250-DR” , they definitely stopped making GT parts , so their main focus is GV bikes. Hyosung KR Motors owns a chinese company thats even cloning their Korean 650cc for the updated GV650 ABS model that is already out in europe.
If you strip a 2016 black engine, of a 125cc, you will see under the barrels , it will say “made in china” but other parts + R&D is still South Korea.
China is just wild , they even call Hyosung a different name over there!
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Yes, I know China is dodgy as it gets. Rubbers perish and dissolve, bearings don’t last, and made of the finest chinesium (guaranteed pure metal LOL). I would not give them my patterns or manufacturing as this is what they always do. But quality can be good at times, just not often, and not close to Hyosung quality control. If you look on the cylinders in the photo they do say GV 250 so it is a blatant copy. Makes me wonder who Hyosung farmed the work out to. I remember a famous pen manufacturer, maybe 20 years ago had trouble, 12hrs making for the client, 12 hrs making for chinese fake. There is no recourse for copywrite or IP rights if you find your product cloned in china. The cub engines have got quite good, but still a very hit and miss purchase. But if OEM parts are unavailable then it might be an answer, but not the preferred choice. Just see how it goes, it is interesting to see that they have cloned it as Hyosung are good engineers. I would like to get my hands on one of the engines and put it through its paces. I have good experience with Hangkai outboards, they are clones of Tohatsu, Yamaha and Mercury.
The engine shown is EFI so it would need stator and flywheel change for a carby set up.
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Pleyebo, I agree completely, any hardware is better than none. China is getting so much right now with their manufacturing, I hold out very high hopes of some good stuff. There is big market in UK and Europe for these parts, I hope the Chinese manufacturers grab the chance to take it. Just putting their products and parts on Aliexpress would be sufficent and avoid much of the European and UK red tape, EU warehouse issues, retailers etc. I am very excited at the prospect of these engines and parts becoming available outside of Asia.
That spec sheet you posted is a different write up of specs than I saw. So which company did you find? Here is the Yinxiang spec sheet, with their bore and stoke being 65×50 so giving you about 335cc. So there is variation out there. I want a 335cc engine to play with.
Please note a correction to the 350cc engine code I posted it is 2V64FMP not 2V67FMM as I originally posted. I should start wearing my reading glasses, but I can never find them LOL.
The carb below is the one quoted in the spec sheet for the 250cc – PD26J. The clone of the Honda 250 rebel carb. Looks very similar to the Hyosung carbs. 🙂
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I need to do more hunting as the Yinxiang contact I found, Jinhau Kaichen Trading CO, LTD, have replied and want to sell entire engines by a minimum of 50 units and at nearly £1,500 an engine, then add shipping and customs makes it crazy pricing. Not a viable option, but I have not given up yet as there will be suppliers and factories rather than a trading company. I just have to dig deeper. Hopefully the realisation of the size of the market available will nudge one of these factories/suppliers to start selling parts, they will make good money doing so.
A very different experience to the Hangkai manufacturer Taizhou Gongda Motors, who I have dealt with and purchased from, they where very helpful and keen to sell the parts that were very hard to source in the UK for their Hangkai outboards. I cannot rate Taizhou Gongda Motors high enough, a very good company with very high quality products.
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The carb below is the one quoted in the spec sheet for the 250cc – PD26J. The clone of the Honda 250 rebel carb. Looks very similar to the Hyosung carbs.
AFAIK the honda rebel carbs are horizontal flow. Not sure if the floats will work in a vertical flow set up. I was about to buy one set of PD26J when stumbled upon that detail and stopped my progress there. Now I’m fiddling with a Mikuni I bought and found that’s been badly treated by the previous mechanic(welds and siliconeitor… 😯 )
How can I send PMs in this forum?
Thank you.
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Plebeyo, you’re right that a horizontally oriented carb won’t behave properly if you try to run it vertically. Even if you could tweak the internal jet positioning, you’d still be into redesigning the float and bowl to make it work properly, which quickly turns into more trouble than it’s worth.
I was digging into the supply chain behind engines from Yinxiang , and it’s pretty complex. One thing that stands out is that part references don’t always mean exactly what you think they do. You’ll often see familiar names used even when the part itself has been modified or adapted.
A lot of that comes from how the industry is set up around Chongqing, where there’s a big cluster of manufacturers and shared suppliers. Designs, tooling, and parts tend to overlap quite a bit. Because of that, something labelled “PD26J” is usually more of a reference to the general design and fitment rather than a guarantee it’s identical to a Honda spec carb. It might look the same on the outside and bolt straight up, but internally it could be quite different depending on the supplier or the engine it’s meant for (like a V-twin setup).
So in a lot of cases, it’s really more “PD26J-type” than a true PD26J. Makes sense once you realise what’s going on, but from the outside it can be a bit of a headache to figure out what you’ve actually got. It can can really run you in circles.
So a CMX250 carb clone will not run a v-twin, but internally in the China supply chain the v-twin carb is still referred to as a PD26J.
For a carb replacement I would talk to M77 about it though the Hyoriders site contact to see if he has one available – he has an Ebay shop with parts, or look on Ebay for a GT/GV being broken for parts and contact the seller.
I have no idea how to PM people on the forum.
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Not sure what happened there my reply showed error when I edited it because I missed out Yinxiang and Chongqing, then it vanished. So here is another attempt, I hope it is not a duplicate.
Plebeyo, you’re right that a horizontally oriented carb won’t behave properly if you try to run it vertically. Even if you could tweak the internal jet positioning, you’d still be into redesigning the float and bowl to make it work properly, which quickly turns into more trouble than it’s worth.
I was digging into the supply chain behind engines from Yinxiang , and it’s pretty complex. One thing that stands out is that part references don’t always mean exactly what you think they do. You’ll often see familiar names used even when the part itself has been modified or adapted.
A lot of that comes from how the industry is set up around Chongqing, where there’s a big cluster of manufacturers and shared suppliers. Designs, tooling, and parts tend to overlap quite a bit. Because of that, something labelled “PD26J” is usually more of a reference to the general design and fitment rather than a guarantee it’s identical to a Honda spec carb. It might look the same on the outside and bolt straight up, but internally it could be quite different depending on the supplier or the engine it’s meant for (like a V-twin setup).
So in a lot of cases, it’s really more “PD26J-type” than a true PD26J. Makes sense once you realise what’s going on, but from the outside it can be a bit of a headache to figure out what you’ve actually got. It can can really run you in circles.
So a CMX250 carb clone will not run a v-twin, but internally in the China supply chain the v-twin carb is still referred to as a PD26J.
For a carb replacement I would talk to M77 about it though the Hyoriders site contact to see if he has one available – he has an Ebay shop with parts, or look on Ebay for a GT/GV being broken for parts and contact the seller.
I have no idea how to PM people on the forum.
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The carb below is the one quoted in the spec sheet for the 250cc – PD26J. The clone of the Honda 250 rebel carb. Looks very similar to the Hyosung carbs.
How can I send PMs in this forum?
Thank you.
We did have the PM system before , but because of AI on the scene, I locked it down to stop guys getting silly PMs of AI Robot girlfriends and Ai gold diggers trying to get past this site, so I will figure it out one of these days. Though if publicly one has asked Rider 1 on his forum to contact me to send an email to Rider 2 , then i will facilitate the email exchange, it’s not ideal! but it’s one way around it temporarily – I don’t like adding “are you human , solve this complicated puzzle before sending this message etc” like you see on the contact form , I want less friction for everyone , not more of it. bare with me!
Honda Rebel carbs , nope, but some HAS made their own welded custom manifolds on a GV cruiser with a custom airbox , and made it in such a way that the carbs hang at the side of the bike (almost) and used keihin flat sides, this was many years ago, so can’t find the post on social media. I thought to myself, ahhh narr , I will just get another OEM set and rebuild it patiently! – carbs take too much of my workshop time but i will always choose them over 30+ EFi electronics i need to stay paranoid about.
Cost of living on the world isn’t going to make a rider fork out £1500 for an engine, they would get a whole bike for that! – 50+ units could work for a dealer though if they have a fleet of bikes and need spare engines for their customers in their workshops.
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Cost of living on the world isn’t going to make a rider fork out £1500 for an engine, they would get a whole bike for that! – 50+ units could work for a dealer though if they have a fleet of bikes and need spare engines for their customers in their workshops.
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I quite agree, £1500 for an engine is crazy, I could get a cloned Toyota 1zz-fe engine (Celica, Corolla etc) for around that price with shipping and customs included. Plus somebody could buy 2 or 3 Hyosung 125/250cc for about £1500 now they are getting on in age.
I am enjoying my sniff through China and have a couple of more ways to track stuff, but I feel it will lead to nowhere. The most likely to see a result is using 1688.com, suppliers are on there but you need the right Chinese search terms to find it and use the picture matching system. Then if they can be bought and shipped you will likely get the “not quite the same as OEM fitment issues” that I am seeing in comments for the cloned GT manifolds. I have ordered a set of the cloned GT manifolds for experimental purposes, as it is a simple process to make modified airbox funnels.
But the engines are in common use in China and they are in a quite a few bikes, so the parts may trickle through eventually. You can already get cylinder barrels, head gaskets, pistions, valves etc for the 250. I will not devote much more time to looking, the whole system is a minefield to navigate. I just love these bikes and have owned a couple now, instantly regretted selling the first so I went and bought another. It breaks my heart to see them dying for lack of parts, so even though it is likely to be fruitless I don’t see it as time wasted.
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