hey, i bought a centrifugal clutch that has a bore of 1/2 in. and a #40 chain. to match this, i need an X series hub with a bore of 1/2 inch, to hold a large #40 sprocket, except at my local store, there are only W series hubs with 1/2 inch, but then i can't get a big enough #40 sprocket to be worth welding on. can anyone please help?

let me rephrase this, How many different ways can you attach a sprocket? please let me know what they are, thanks a lot :)