Hi chaps,   when I bought the Cub (200cc, R cam, largely standard) I was advised that the Cotton PW22 carb went straight on and was positively the bees knees.    So I bought one.

It doesn't go straight on, I can find nothing on the internet about it and have had no response from the seller.

Does anybody know anything about it?

Does anybody know where to get a manifold to fit? 

Thanks chaps.

This is the carb that came on my cub, I am pretty sure it's the same carb you're talking about.

Hopefully these shots help.

Thanks Samwise,

I've got the thing on and running. It starts well but no tickover yet. Haven't tried it under load yet either.

Try here http://kidsatvparts.com/chinese-bike-parts/fuel-system.html

Loads of 'look alikes' under different names.

1 hour ago, dabbist said:

Thanks Samwise,

I've got the thing on and running. It starts well but no tickover yet. Haven't tried it under load yet either.

Good to hear. Mine had been sitting for 30 years and had a few issues. So I ended up getting a Mikuni and it runs like a watch now.

Well It's not quite Rolex yet, but I now have a half reasonable idle and it picks up without hesitation. So it looks like we're down to fine tuning (ish) 

Sorry chaps, I hadn't got around to concluding this.

A day spent fiddling with needle and air screw settings finally got it running well.

Tickover is still a tiny bit fast, but there's no hesitation, even if I really snap the throttle open and it definitely seems to produce more grunt than it did on the Amal. 

It's strange to set up, it seems to be either right or doesn't go, with very few options in between.

Thanks for the help all.