So far, I have taken advantage of the credit a total of 5 times during the past 10 years. The first two times for my purchase of two Electric Motorsport GPR-S bikes. Interestingly, those motorcycles were not authorized to receive the rebate as the company had not filed the appropriate paperwork with the IRS, although they did qualify for the rebate due their technical specifications. However, I applied for the rebate anyway and received 10% of my purchase prices as a credit against the amount that I owned on my 2009 and 2010 tax returns. I got the money and was never audited.

My three Zero purchases also qualified my for the 10% credit as Zero did (eventually) submit the correct paperwork verifying that their bikes met the tax law's standards for the credit. Their VIN numbers were entered into the IRS database and when my tax preparer plugged my rebate request into the IRS electronic form, it was immediately approved - at least for the 2012 and 2014 Zero purchases.
However things changed in 2017, which was when I bought my 2018 Zero S. Electric motorcycle purchases did not qualify for the credit during that year. So when I filed my 20-17 tax return, I could not claim the credit. Then Congress (in its great wisdom) passed a new tax law during the spring of 2018, retroactively making the rebate qualify for 2017 purchases, but not 2018 purchases - go figure. So I had to file an amended 2017 tax return in July of 2018 and a few months later I received a check from the U.S. Treasury in the amount of $1,830. So it all worked out nicely in the end, but U.S. tax laws and likely the thinking behind them sure are convoluted.

Frankly, I wouldn't be surprised to hear that the introduction of the H-D Livewire resulted in the re-authorization of the tax credit, rather than the availability of Zero or Energica electric motorcycles.
Regarding the other EV products that are apparently covered by the new tax law, my recommendation would be to apply for rebates for your purchases of those items. All the IRS can say is "no" and not give you the rebate. But in my experience, they seem to have bigger fish to fry than that sort of nickel and dime stuff and you will likely receive the credit that you are requesting.
