Hi Ryan:
Nice little bike. Some of our Lil Indian fans have been trying to determine if there is a correlation between the frame heights of these bikes and the years in which they were manufactured. That said, would it be possible for you to post the dimension of your frame? What we're looking for is the space between the lower and upper frame tubes. You could measure from the top of the motor plate (if that's easier) to the underside of the upper frame tube. I believe the motor plates were made from 1/8" stock. Also, as asked earlier, did you notice if there was a hole in the plate? If so, it should be about 11/16".
Thanks, Henry