I know it's not a 465 or 490, but I do have a 1980 IT 125. These were pretty rare, only had them here in the states for 2 years ('80/'81). Kind of a 3/4 sized bike. Basically based off the YZ100 with an older style YZ125 motor with different tuning. Lugs like a trials bike and weighs about as much. A very easy bike to ride too.