I need help!!

[jonnyp]

So a little while ago my chain snapped on the motorway and caused a bunch of damage to the back of the bike. I got all the damaged parts replaced but ever since then it has felt like the clutch is slipping under power. So I changed the clutch and it was very worn so I figured that was it. However, now it is slightly better but still not right. Is this a gearbox issue and if so what could be wrong/ can i fix it without robbing a bank?
Any help will be appreciated