Hi Guys!
You don?t race in wet overthere I supose,only in sand(glamis).
I got one to,maybe is the euromodel of kx500 who got it?
But I use only mine if it?s VERY much water/mud.
You can drill a pair of holes in the airbox highup, to let more
air in.(post some pic later)
I think the airbox is way to small for a kx500!
(Kx250 1988-90 got the same airbox)
When I race Iceroadracing, I have a KN-filter attach direct to carb...
(look at my gallery page 2).
Got some more HP at full throttle.
//doordie