Dont know the individually bike but as registered in 2012 SHOULD have had all upgrades done as point of sale.
Motogb should have a record.
Personally love the tornado, not quick by modern stds but still enjoy riding it , even with a year old gsxr1000r in the garage.
Main thing to check is that upgrade z25 gear is fitted, plus later clutch basket.
You may be aware but 900 production stopped years earlier than 2012, (minds gone blank but finished either 2005 or 2007) so it will have sat in a crate for years. Check it's not on 2005 tyres!
Other than the above they are great fun bikes to ride and generally pretty solid, just like proper TLC. Enjoy!