05-03-12, 08:37 PM
If i was a betting man i would put it down to the immobiliser. Had a crappy datatool on a zzr that did exactly the same thing. I also had an sv 650 that had the datatool disconnected because it had starting problems. Fazer's 2003 on.. have a plug to attach meta/datatool alarms. My mate wired a meta 357t to mine direct into the harness (More secure!) when i bought it new. Its now 7 years old and i'm wishing he had just plugged it in, so that if it packs in i could remove it. 
If it's broken, it's not fixed.