so i want to do the shifter mod that everyone on here is doing, on my raptor 350. i went to my local dealership and told them i wanted to buy a shifter of a yz250. the first thing they asked me was is it for a 2 or 4 stroke. i didnt know what to get. they told me that the yz250 is 2 stroke and the yz250f is for 4 stroke. which one do i buy???? also trying to find somewhere to get some port and polish work done. i live near dallas,tx and.you would think i could find someone to do it, how much do this cost and can anyone help. thanks a bunch:atv: