2008 xb12 with jardine rt-1 slip on does the bike need a tune or remap? Hi I just bought a 08 firebolt xb12 and Love it this is an awesome bike!This is my frist V-Twin, I just added a jardine RT-1 slip on and it sounds great but it seems to backfire do i need to tune the bike or do something to it? It's got 80 miles on it. please inform me Thanks