Quick question

Fellas, is it a bad thing to take a bike to the track ?

I see that many people that put their bikes up for sale, make it a point to say that their bike has never been to the track or raced or seen rain or redlined.

weren't these type of bikes designed to be raced and pushed to the limits ??

so why is it a bad thing to purchase a bike that has been to the track ??

I only ask because I never been to the track myself so I wonder why would it be so bad to purchase a bike that someone has taken to the track before....

I got my flame suit on so flame away if this is a dumb question.....

Thanks,
Bye