Didn't BMW achieve the emission requirements by going to variable valve timing in the R1250 series by using the existing engine and modifying the heads? Couldn't Yamaha do the same?A while back someone posted a link to an excellent article that explained how that is not necessarily an easy thing to do, and in fact can be a very hard thing to do. Sometimes necessitating a clean sheet new design. I'm not sure they sell enough FJRs to justify the cost of a brand new design.