Alright boys and girls, I just recently purchased a non-running motorized bike that came with the cylinder with a block setup with the included fat reed system. Anyway, the previous owner did a funky setup where he used some pipe fittings to drop down the intake opening so he can use the standard NT carb. I want to get rid of it and use an oversize carburetor...... I looked on Ebay for ideas and from the block/reed setup listed for sale that looks similar to mine, it says the setup is compatible with the VM24 carburetor? With that said, I also did research and even 21mm fits..... so I'm assuming the 21-28mm is based on the inner diameter opening of the intake rather than the outside (which I believe is 35mm or so)? In which case, I suppose I have a few options concerning which carb to choose. My question is, should I just go for the VM24 carburetor or do I go for one of them OKO something something 21mm? Any help/suggestions would be appreciated!