The only reason why you gain hp when you put a exhaust on is because the engine doesn't have to work as hard to push out the burnt fuel and gases. The easer the gases leave the engine and exhaust the more power you will get to a cretin extent where their is not enough back pressure and you will start to lose power then. You may gain 3 peak hp but that not all you should look at, you should look at the whole curve not just peak. Most people just look at peak hp and not how much they gained over the entire curve. Yes you might gain 3hp but you might not, it all depends on the bike, some bikes react different to mods then others. Another example is when you put an air filter on the bike and gain .5 hp on this bike and 1 hp on another. The reason why you gain hp when you put a air filter on is because the engine doesn't have to work as hard to get air into the engine. Another example why you get more hp, When you bike was new it made 100hp and after 1000miles it now makes 102hp because the seals and engine components loosened up and the engine doesn't have to work as hard to turn as it did before. Same basic thing the less the engine has to work the more power it will have.let me ask you this, does it actually gain 3hp or does it let the engine have a better chance to achieve its max rated hp.
I'm curious how a slip "allows" more air into this equation? A filter...sure, less restriction allowing more airflow, but an exhaust is a one way street. A slip allows more air OUT, but not into the fuel:air ratio. Lessens the back pressure allowing the exhaust to flow more freely when escaping the cylinder (i.e. the engine doesn't work so hard to push it out). If you want to maximize your fuel/air burn, I'd suggest looking at your ignition, timing, etc. Make sure your fire is hot enough if you're bumping up your fuel to air mixture.I'm not sure about this whole "engine doesn't need to work as hard" stuff. I'm more into maximizing the fuel/air ratio such that you have a complete reaction. i.e. all the Oxygen is used and all the fuel is used. If none of either is left over, you got the most bang for your buck. Filters and Slip-ons allow more air into the equation. More air means we can also add more fuel to the ratio. More air and more fuel mean higher yield and larger HP numbers.
YEs unless your at the track pushing your bike to the limit which most can't do anyway you wont need the extra HP. You may notice a bit increase in power through the Mid range, but they are more for sound. It's not peak HP that you will prolly ever noticelets be honest, you haven't bought an exhaust for more hp, u bought it so it looks the business, these bikes are fast enough...and very few poeple are riding them to their limits on here anyway!
so yeh it is nice to know that u got a little more ooomph than joe bloggs but dont be dis-heartened when people tell u its just 2-3 hp extra.
the only thing thats gonna make ure bike faster is you, by the way u ride it, u kan hav all the mods in the world......rider makes the biggest difference!
so just giv it sum AMPS!!!! (but dun come off or u will fuk ure exhaust rite up)