is you need this one10mm Diameter x 1.25mm Thread Pitch, Single BleedK&S 12-0010
You can also move it from where it originally is down close to the brake rod if you can make a bracket. I put on the 3 inch extension's last week and I made a bracket out of aluminum that holds the original switch and it bolts to the extension bracket and hooked the spring to a small bracket that bolts to the brake rod itself if you dont want to mess with bleeding the system.Toolfreak
I made the new bracket in about 15 minutes out of some scrap aluminum in my garage and installed it when I put on the extensions on so I did not have to buy a switch or bleed the system, I beleive in my case it was less expensive and less time involved.Toolfreak