I have an '86 TRX 250R that I am putting a FMF Fatty on. The salesman that made out my order said that I would have to use a spacer (washer or something) to make the pipe fit right. Is that true, and if so what is the best way to fit the pipe properly. Also, when I go to re-jet the Carb, do I have to buy each Jet seperately or is there a kit out there that I can buy. Any help is deeply appreciated.