Hi BG Mock I have a 5 port with a recently added turbo head, I bought the motor with no carb and have fitted my old nova p5x carb to it with a 7.5mm restrictor. I also run a my old trusty 6886 pipe, seems to give the Go a nice smooth feel and not so ball tearing! I run an LRP 6 plug and the thing goes like you wouldnt belive!! With this set up I can make 10 min finals in my LSP-R, that is with the stock 125ml tank. I am not running it lean either temps are normally around 130C. Hope this helps!!!