I think the critical part for speed and restriction is the tail pipe...am I not right??????
or the ports of the head where it meets the head of the exhaust??...like when I had a TZR where you could adjust the amount
of air coming out of the engine?? or fit a power valve to open it at the right time of revs and add racing reeds
so I think it has a lot more to do with the silencer on the fzs like what paulfzs said I have seen inside the standard pipe
or seen whats coming out of it every time I shake it...lol....sounds like there is a tin of dried peas in there
![rollin :rollin](https://foc-u.co.uk/Smileys/efocicon/rollin.gif)
now my question is what other mods can you do to add more BHP to these lovely girls...can you do remaps and shits and giggles like that
I say that because I had a run in on the way home from BMAD with a mt7 and he could not get past me when I had the tail pipe on
......(more then likely got scared of the sound of it..
![rollin :rollin](https://foc-u.co.uk/Smileys/efocicon/rollin.gif)
)...but honest he struggled
MORE BHP im a granddad as of today so need to hurry up...