fatty pipes?

[Freestyle Freak]

what exactly does one do to the performance of the engine of your bike?

[cowgirl]

Sorry, couldn't tell ya!
But shouldn't this be under bike tech?

[yzl337]

I believe it's supposed to open up your bike's entire powerband, especially in the low and midrange, however I don't buy into the whole aftermarket pipe business, they might make your bike look better, maybe even change the powerband a little, but it's not gonna make it a whole new bike, I run a fmf fatty on my yz, and truth be told I noticed only a little difference from the stock pipe, mostly in the bottom of the powerband

[Honda26]

Tha main reason of aftermarket pipes is to smooth out the power delivery and make it more useable... when i first got my 02CR80 it was soo scetchy... when i put my Gold series Fatty and PowerCore2 silencer on there is smoothes out the power so nice... plus it punches up the low to mid section really nice.

[Freestyle Freak]

are they only made for 2 stroke engines,or can you put them on 4 strokes as well and how much would an aftermarket one cost for...say a honda cr125??

[ont.freerider]

honestly dude, i only put them on my 2 bikes ive had to dress them up. i get them for looks, if adds a little HP, i dont notice it, nor do i care. my bike has enough balls as it is.