Reply To: Look what I found in China
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.