@davethepaint, welcome within the hive!
AFAIK this PGOs came in 160 and 220 ccm, though the 160 had a two- and a fourstroke version, even liquid cooled.
Well, if you got a two stroke model it's fairely possible to kill it within your mentioned 9000 mls.
Easy to repair IF you you got some skills and all parts needed.
Older than ten years and parts to buy does not stand for, if you have to pay for the scoot.
Like Iahawk says, either another working motor or leave this scoot where it is.
To go price for such a used motor might be €200,- here in Italy, so take a pick.