Well, I hope the court makes them replace the whole thing for you from prison or wherever they put them. I'd really show up at their sentencing and get with the prosecutor and tell the judge that what you got back is unacceptable and an unusable mess. You're talking about kids here, so the best thing about it is they have parents that can pay, deeper pockets ! I don't know what you have into the bike for a build, but I'd say replacement front to rear is in order for just the bike is a reasonable expectation. Then they can have & keep the one they stole, with a bill and a juvenile record.