there was a few years, I was clocking 35,000-40,000 miles a year on 2 wheels. I put 135,000 on my SV650 in just 3½ years
I was still working then, using my bike for business errands, there was a couple years I claimed over $15k in motorcycle mileage
fwiw, as of July 1, 2022, IRS allows a 60½¢/mile deduction for motorcycles