I'll apologize in advance for my lack of knowledge. So I understand that a free flowing exhaust can be good so long as the fuel map is correct. I also know back pressure matters, not sure I really know why. Now for my question, I have an almost brand new Akrapovic exhaust from a 300 cc bike. If it physically fits or I can fabricate the connection would it be a bad idea to use it? I guess what I'm wondering is do manufacturers really design and test their canisters against each bike or do they often reuse the canister?
Thanks!
Hi swearengen welcome to the forums... There are a couple people on here ( me not included ) that can answer that question and with a good amount of knowledge in that area.
Back pressure is absolutely important on 2 strokes, I am not all that aware how much importants it plays with four strokes, except more is a bad thing for fuel economy is what I've read - but don't quote me.
I doubt they make a whole new system for each bike, I bet they Re-dress the old style pipes & create new attachment to affix it to a new bike. the catalytic converter on the 400 already supplies some restriction to flow, every thing past that is pretty much for sound mitigation is my understanding.
I wouldn't try to put a moped pipe on a 400 but you could easily try a 250 or 300 pipe, and I bet it work fine.