speculation on my part......
it's likely the "2" is significant in "2"110, "2"111, so forth and so on.
i believe probable the early pp bike with the different s.cover badges was could have been numbered beginning "1" or "1"xxx or what ever.
i believe possible the "2" indicates the late pp bikes to be 2nd in the pp series.
it would seem to make sense the early pp bike had a "1" as the first digit of the vin.
why "10," "11", "12" and "13?" why not 2001, 2002, etc... ? good question. maybe because there 9 other late pp units before 2110.... ? and these units were used as test mules before the following 4 machines were presented at the Las Vegas dealer convention......... ? these first 9 late pp bikes never left Japan, were used only for testing purposes and were seen only by the folks at Honda....... ?
as i said, speculation on my part.