Hi. I recrecently brought a 2nd hand 2007 St1300 with 7000 original km on it. I noticed vibrations through the handle bars when decelerating, no brakes applied, from 110km. I had a similar problem with a previous bike and I changed the tyres and did a balance and that fixed it. The ST had the original tyres on it and so I replaced them with Pirelli Angel GT'S, not the ones preferred in the owners manual. The bike shop did t thinkthat would be an issue. Outcome, it is better, less vibration, only really obvious decelerating between 80 and 60 kmh. So... any ideas what might be causing the vibration and how do I fix it?