Did that, too. Took the test on a '76 FXE and passed first try.
I did as well. I got pretty familiar with the back roads around town. Then, on the Sunday before the Monday I was scheduled to take the test, I was out back doing some last minute practicing, and I looked in the mirror, and here comes a sheriff's car, with lights blazing. I pulled over and got ready to be read the riot act - I've never had good luck when getting pulled over - but he raced on past me like I wasn't even there.
Then, five minutes later, I'm on a different road, and here comes the same sheriff's car, lights still going. I pulled over again, and he flew by, again.
Finally, on a different road, that happened again, the third time. So I decided that I'd had more than enough practice and was just tempting fate.
The next day, I rode to the DMV, and took the test - and passed - funny thing though: nobody bothered to ask me how I managed to get the bike there, seeing as I was on my own.
