i was wondering which would be the right jet to run in my 2002 scrambler 400 2x4 i am getting the rest of my pipe and was wondering what jet would i need it is a full fmf pipe with k&n air filter with maybe no cover or that long thins that goes no where what size jet will i need with that thanks

 

need help fast i need to get the jet thanks

 

come on guys please help me i want to order soon