I have the FMF titanium 4 exhaust on my 400ex. It is a pain in the %$# to start, so I am going to take it in to the local honda dealer for a tune up. They told me that I need to tell them what jet setting(i think) that fmf recommended for my atv and I have no idea, nor have i been able to find any info on this on the web. Thanks for the help!
tyler
tyler