It's too bad Whizzer doesn't use the modern threadless headsets, but there might be hope. Back when threadless was new to BMX, some riders wanted to use the new 1 1/8" forks in their 1" frames. Someone figured out that you could take the 1" threaded Tioga MX-II headset to a machine shop and have the races milled out to fit the 1 1/8" fork, resulting in a 1"/1 1/8" hybrid headset.