Our 500cc primary drive clutch assembly for the Polaris Sportsman 500 ATV uses a 29.5 mm bore size for the shaft.
This aftermarket replacement drive clutch is a new manufactured item and is not a rebuild. It meets or exceeds the original manufacturer's specifications.
We have sadly not confirmed compatibility with that model. We'd recommend comparing the images and specifications of this part to that of the one you are replacing - if they match, this should work for you. If you're unsure, we'd recommend performing further independent research, contacting a local small engine shop for advice, or reaching out to the manufacturer.