Hi everyone...
So after a good month or so after fitting the kev mod and dna 2 filter, which seemed to help some of the surging and pretty much eliminate the dreaded stalling at lights and junctions there seems to be a new problem.

Not sure if it's related but the dip beam stopped working on the way home leaving me with main beam which lasted about 10 miles before giving up..... since then the engine management light flickered on and off intermittently but not consistently, although maybe when under acceleration. She's been to the local yamaha dealer who plugged the special device in and said it has lots of strange codes displayed. So strange he's had to contact yamaha who are going to get back to him..... although the hint is that it may be something to do with the fuel injection.....

Anyone any ideas or experienced similar?

Thanks