rearenginekarts.com

Its one of the red white and blue 3/4 " pto motors , looks NOS ?

Here is a link to the add

http://minneapolis.craigslist.org/spo/731646382.html

It's a 91 not a 101.

Hmmm, Looks like a 49 model to me. Three exhaust ports and a fixed head are the tell tale signs.
Steve O'Hara