So last week I bought a 2001 blaster it needed a new piston but after I changed it it ran good for my whole upstate trip now the question I have is how do I kno what fatty pipe it has on the front because the one my cousin has is stock and mine is not I was wondering if there is a way to tell so when I clean out the carb and rejet it I kno which jets to get and where they should go i don't have a picture of it but the only marking on it is a square plate on the side of it is held on with springs and was a direct fit for the fmf powercore 2 which it says will not fit stock pipe I will try and get a picture later if I can