Originally Posted by fishkens
Here's a question: So why didn't BMW provide a spec for a worn chain or timing sprocket (per Clymers)?
It seems that we're entirely on our own when a fairly simple gauge (for sprockets) or spec for chain length could be provided (even bicyclists seem to have invented better guidelines for replacing these components).
Certainly, symptoms (noise, shaky timing marks, etc.) can indicate a need for a replacement but specs would help.
Just curious if anyone has any insights.
Just dragging this up again as it's my job for this week. I was asking myself this question today.
Here's my sprockets. I was wondering whether to replace the crank sprocket before I started reading this thread however I guess a new one is something i won't have to replace again. Thanks to all those sharing knowledge that has made my decision easier