Alright, so I've posted some stuff on the mopedarmy forums, but I'm deciding to post this here. There's just something about some of the people at that place that turns me off. It's hard to have a real discussion there without children chiming in.
So I've been looking for a replacement carb since my 15.15 sha broke. It was a clone, and it had some stress cracks around the mounting point when I got it. It never wanted to seal right (my guess is the plastic sleeve), but I guess with all my loosening and tightening those stress cracks became worse and cracked.
I didn't like the way it was anyway, I bought it at a time when I didn't know much about motorcycle carb designs and I've had several motorcycles since then, and after reviving my moby project is has been a dissapointment with only one jet and adjustment screw to say the least.
So I started my search for a decent carburetor at a budget price and I came across a copy of a mikuni carb for the pw80. It's a clamp style carb which I believe is 15mm. The brand of the one I got is Wabron. The casting is good, not super clean but it's not much different from some of my original mikuni's or keihin's and it looks fine. Has a nice sturdy feel to it. It came with two mikuni style jets, both unmarked. I believe the main is in the 120-130 size and the idle is 15, as it's supposed to be jetted for the pw80. It uses standard 4/042 mikuni main jets and the normal 14mm idle jets. It is made for a two stroke so I believe the atomizer or whatever is set for that.
The ID of the manifold clamp is about 25mm without the plastic sleeve. With the plastic sleeve it's about 21mm, inbetween 20-21mm. I haven't mounted it yet but I believe you could buy a phbg plastic shim and it would fit to mount on that style of manifold. It also seems you might be able to use a 1mm shim for the dellorto sha inside the sleeve it came with to mount it on a sha manifold.
I'm ordering jets for it and the shims and possibly a phbg manifold so I'll report back what my findings are as far as mounting and performance wise. I'm pretty sure it fits and won't rub on the frame so I don't think mounting it is going to be a problem, but I'll report back whatever I find out.
I took some pictures of it's externals and internals, take a look:
Intake side with sleeve.
Inside the float bowl.
Slide, choke, Inside the top.