Hey guys i just bought and installed an FMF Megamax pipe for my fiancee's 2005 TRX 250EX. The bike has a power adder kit installed and thats basically it for mods. I was curious if anyone has delt with this pipe. I was wondering what would happen if she ran it with no disks and no quiet core....as in engine damage or anything like that. also if i were to install the wrong amount of disks whether that would damage it. Its already installed and we are currently running it with nothing but just wonderd what the opinions of the riders were who has used this pipe. Thanks Guys.

 

You won't damage anything no matter what configuration the pipe is in, as long as you have it jetted properly, and have at least 4 discs in the end so it's not getting choked out.

I had one of these on my honda recon, and I have to honestly say I thought it was a terrible exhaust. FMF uses allen head bolts to hold the thing together, with steel nuts welded to the inside of the can. Well, steel rusts from moisture, and gets weak after it goes through heat cycles, so the bolts seized up, and the welds on the nuts inside the can broke so they just spun, so I had no way to repack or retune the exhaust. FMF is just flat-out stupid when it comes to designing exhaust silencers.

Maybe if you take all the bolts out now (8 on the can, 6 on the end cap) and put some anti-seize lubricant on them you'll have a chance of getting them back out when you want to repack or retune it.