Hi I am new here but not to Sport Bikes. I have a 2007 ZX-14 and a old 1986 FJ1200 Yamaha that I Bracket Race but very often now. No time. I restore and sell little Honda S-90 motorcycles. Back in the 90's I was Sales Manager/Tech Support at D&D Performance Exhaust back when they Really made full systems 4/2/1 that actually worked. Now they are slip on's for Sport bikes and now they have gone H-D. Not that is a bad thing just not for me.