If you happen to smash your headers flat, don't worry about replacing them, just drill a hole in it so it won't hurt the air flow. It actually helps it run better since it's letting the air escape faster.... And yes that's what I was told by a customer who brought his bike into the shop for a tire change, rear pads & plugs. I know there are several on here that work at shops or are in the industry so what's your "performance tip of the day"?
The hole needs to be bigger, that little one won't flow much. Tell him he needs to drill it out, he'll gain 10 horse.
Jumping curbs on bikes that aren't meant to do that......sucks, but at least he had a great fixer cure!
performance tip from a customer: run your tires 10 psi lower than recommended for optimal grip. this was told to me this summer by a guy with (no shit) 2-3" chicken strips on regular-ass dot tires. he asked me if i checked his tire pressure during service and i replied "yes, of course...they were a bit low." to which he responded "can you put them back where they were?" i tried for a moment to explain to him that this is the recommended pressure as per the manufacturer and that for street riding it's probably best to follow their advice but i gave up momentarily as he was pretty convinced he was right and suzuki/bridgestone are wrong. really nice guy and his intentions were genuine. i ended up talking to him later about bike performance, racing, etc. and that if he ever wanted to get on the racetrack that i'd be happy to help steer him in the right direction/walk him through it all. but man, some of the bullshit that's out there...
I've seen some dumb shit but the one that just won't go away is the idiots that only use the rear brake 'cuz the front will make you crash".
The best advice always comes from my brother's next door neighbor's cousin who rides a CBR Ninja 1100.
It would have been one thing had he drilled a hold and pulled out the smashed part then weld it or even put in a bolt, but all he did was did a hole...doh Anyways, I have heard (at trackdays even) people running their pilot road 2/3 at 20 psi for the track cuz that makes them work as good as race tires. Then they go back to 36/42 for the street for mileage..
I've also had dealerships set tires at 42 psi because that was the max rated pressure on the sidewall. Plenty of stupid to go around.