id go an oko 24mm... youll have to source one off ebay international as dhz doesnt have them.
you could get a 26mm to work on it but it will be a pig... no low end response and my guess it would be hard to tune due to the lower manifold vacuum compared to a 140/150cc..
be careful tho, theres a couple of shonky looking 24mm okos gettin around on ebay which take the wrong jets....
actually the best place i recon to buy one would be from akunar.com... look in the carb section and it should be first on the list....
they are expensive tho, but there genuine carbs..
