I have a 99 banshee with many mods done to the bike.The mods done to the are FMF pipes/silencrs FMF ram valves boost bottle reed spacers pro design,cool head with 19cc domes,timing advance plate,and the flow control intake manifold and wiseco pro lite pistons.I want to put twin 35mm pwks on the bike but some people say thay wont work with out port work.Then other people tell me thay will work but the bike will be real "pipey" witch is fine with me.If anybody can hep me I would be thankful. P.S.I live in colorado so we dont have much air anyway.

 

Your on the verge of being able run them. You probably could, but I would recommend the 30mm pwk(bored out 28). They will fly on your bike. And they will work just as well when you port it. You really wont feel much difference between the 30's and the 35's.