What r the pros and cons? If this has already been posted, im sorry, new to the site:hello:
:+1: Not may have them because most don't consider it worth it for the gains or lack of.If you search through the forum, you'll find out that most people who has it think of the v stacks as merely another piece of the modding bug. No major or drastic increase in performance, very little only.
The new 09 ZX6R has these dual height velocity stacks in that it offers less of a trade off for low and high rpm power. It has approx. 1/2 of the stack short and half tall. It was supposed to boost the ailing midrange of the 07-08 ZX6R's. I know that Yoshiimura had experimented with a similar design with some success.
You can be sure the 2010 ZX10R will have these new fangled stacks.
I know that most bikes have different length stacks, that are tuned to air box resonance.um most bikes do the 2 short 2 long
my 04 636 had em .. my 06 10 has em (both bikes had 2 short and 2 long)
the only ones i know are different are the yahmis with the variable length (servo controlled)