www.zxrworld.co.uk

hi all,
thought i'd offer these out cheap as i only have two left now.
theres the main air box part, back bit that seals to the tank, scoop, and holeless tank flap and bell mouth plate all for £120.
bargain!!

ill buy one please
can i ahve your moby so i can phone you

one left now!

What advantage are these things supposed give? I know the 'Hoover pipes' are a bit of a gimmick, but if these are ( as I suspect ) a sort of 'letter-box', wouldn't Kawasaki have fitted them? Anyway, if they improve the airflow so much, is a full rejetting programme also required. Any before, and after figures, anyone?

ya im a bit sus about these

Yes ramair works, but not on your roadbikes

the advantage is it gives more horse power! it is intended for use on a tuned motor, but would probably make a difference to a standard motor. (never tried one on a standard engine myself). but all the advantages are above 11,000 or so rpm and over a certian mph (probably around 60, i'm, not sure) as the box would need to be pressurised to get the best results.
the letterbox design forces air into the box and with the large capacity of it, the carbs will not empty the box of air, with a small one the carbs will suck more air through than is going in, therefore never reaching full pressurisation.
yes, a dyno run or two would be needed, as i believe on a standard engine you have to up the main jets to a 110.
when bikes are designed i think they have many laws to get round, emissions been one here. and that maybe why they didn't use the letterbox design, (i'm just guessing here ) another point to look at is, is that the standard design is 20 odd years old and if you look at most modern bikes, moto gp and road, they do use some sort of letterbox design as it is proved that the cleanest, stillest air is around 12" in front of the fairing and this is the best air to feed the carbs or injectors with.
as for figures, my own bike is 79bhp on a force fed dyno, there is alot of work done to it, but when we blanked the scoop off it gave 71bhp. so in theory it made a difference of 8 hp.
cheers

good anwser