Just measure the OD of the carburetors where the pods are going to fit. It would be a good idea to pull the carbs & check what size main jets & pilot jets are in there. Stock is 92.5 & 15. Pods & non-stock exhaust will require larger sizes. Also, take a look at the Jet Needles to see if there are any grooves in them (I believe they don't have them). With pod filters & a cut exhaust or 4-1 exhaust, you'll probably have to raise the needles. If there are no grooves, you'll have to use shims (small washers).
Z1Enterprises.com has some of the stuff you need, including jets.
To find the jets on the Z1 site do a search for main jet or pilot jet (singular, not the plural, jets).