For those of use who have never had to deal with this problem, you skills at trouble-shooting the fix have been incredible! The belt-information website was excellent and the pics you posted were fabulous. I've made a separate file with most of the discussion for my own use in case of necessity.
Thanks for scouting out the mechanical territory for those of use who may be required to pay an unwelcome visit to the belt-shredded domain in the future! Let us hope that you've exorcised the gremlin and your ST stays healthy for those long runs you enjoy.
Ron
From: golgrin <ecol@paradise.net.nz>
To: st2_owners@yahoogroups.com
Sent: Mon, November 22, 2010 4:39:21 AM
Subject: [DucatiST] Re: Cam belt alignment
I've posted some pics in the photos section under Cam Belt Alignment.
It's all remarkably simple when you see it but it wasn't for quite some time.
What I found worthwhile noting is that the although the misalignment to all appearances seemed to be caused by the adjustable idler, it was raising the fixed idler slightly more that was the cure.
Shimming both idlers by 0.3mm helped but did very little.
It was adding another 0.3mm to the fixed idler that shifted the belt across.....adding to the subtle tilt of the adjustable pulley I had thought was causing the problem.
I was also surprised that the adding of such a small amount behind the fixed pulley shifted the belt over about 3.5mm.
The grotty looking trial shims in the photo were made from an old quiche pan base.
Started the bike this evening and ran it up to operating temp for the 1st time in months..quiet valves, happy belts, no leaks.
The world is good again.
Colin.
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