that exhaust looks really nice and i spoke to a dealer down a park road yamaha and he said there are surtain electronic tweeks they can do if you are rideing this on a full licence and he also said not to bother with affter market exhaust because the chances are it could do more harm then good or even make it go a little slower as its only come just come out they couldnt of been able to do much testing.Also has any 1 got a pic of this leo vince one. cheaz