Do you know if my Yamaha Warrior exhaust will fit on my
friends atc tri-moto 225dx

 

WOW!! That's a huge difference in machines and technology. My first thought would be that you've got a snowball's chance in heck of those being in any way compatible but if you've got one you can try, you never know what will fit with a little custom fabrication. The first things to measure would be the inside and outside diameter of the head pipe on both machines and then you will have to investigate the location of mounting supports on the exhaust and both machines in all three dimensions. Good Luck!

~HoundDog