Re: Yosh Japan 4-2-1
I have it on my bike,(4-1) bought it from yosh us, from whom I bought all my yosh japan parts.
the pipe comes with a diff oil pan, and really is only for a much modded motor I beleive.
I ran a hindle before, and when I had scott miller build the motor, it did require a better pipe to see all the gains available.(there was quite a diff, I ran that motor with both the hindle first, then the yosh)
unless you get a deal from Yosh(racer net, you need applicable license for that) it will be more expensive than a akro or tiforce, or such, and I beleive you would be better suited with that pipe.
hope that helps.
pm me if you want pics of fitment