1150 engine probs

[Colban]

What has happened is the alternator belt has apparently shredded and taken the timing plate with the Hall Effect sensors with it. Apparently it has also broken a piece out of a pulley?? Is this a common occurence? It seems odd that it should have shredded the belt, it has only done 14,000 miles and doesn't exactly have to work hard for its living. I am suprised it has shredded, that would indicate contamination from a foreign object or something running out of line.

After only 14K miles,i'm surprised the belt shredded as well.As a service item,BWM say change it at 36K miles.
My belt lasked 47K and is still good enough to use as a spare.
I would guess the problem is in the pulleys as well.Replace the damaged one and have a good luck at the other pulley for signs of damage and check the pulley alignment with a straight edge.

 

[rokraider]

Collected the bike this morning from Vines, haven't ridden it yet as had to take the trailer to collect it, but it sounds ok. The fault turned out to be the drive belt shredding, it has lost approx 30% of the belt which has stripped along a rib. The stripped bits have flailed about and demolished both Hall Effect sensors and buckled the tin disc/cup that triggers them. They do not have an explanation for what happened though. Apparently the mechanic has put it back together and checked for alignment and correct tension. Guess I will need to keep an eye on it. £400 to sort it out! Whilst it was there, I had them check the balance on the throttle bodies. Looking forward to riding it again.
Thanks for the advice and tips