Will this fit a Honda HRX426QX 2007? And what other gaskets will I need?

This is the correct carb listed for your machine: https://www.lsengineers.co.uk/carburettor-for-honda-gcv160.html And the correct non-gen replacement: https://www.lsengineers.co.uk/n-g-carburettor-for-honda-gcv135-gcv160-engines-replaces-16100-z0l-013.html For the gaskets they don't do a set to fit your machine but these are the ones you need: https://www.lsengineers.co.uk/catalog/product/view/id/57868 https://www.lsengineers.co.uk/catalog/product/view/id/98355