As soon as you change pipes, breather, add a tuner of sorts the warranty is void on about everything that you want covered anyway. I rarely leave a bike MOCO stock.
Not totally true. IF they can relate the modifications you made to any damage that occurred that you are asking to be covered fore under warranty, then the warranty will be void.
IE. If you change systems on the engine, the trans is still not effected etc.
They can't just void your warranty for doing work unless they can prove it had something to do with the failed part.