vantittelboomthobias

Hello, recently my das best friend passed away and he give me and my dad his beta trail bike. I wanted to fix the bike to ride it, but I don't have any papers from the bike. my dad says it is a beta techno from 1996 or 1997. online i found a lot of photo's that look exactly like the one I got but they are all 250cc's and the one i got is a 352cc. I've searched every website, i have been to motoshops I asked a lot of motorcross guys but I can't find any information about the 352cc