The bearings on the belt pulleys how many miles should you replace them ...thet are inexpensive and i always check them at service time but i am curious as to when they should be replaced by.
i recently was given a 996 to rebuild where a pulley bearing had seized and snapped the belts buggering the valve train.
Jerry,
I replace mine when replacing belts. I think it should be in the maintenance schedule and probably isn't for political reasons to keep maintenance costs down. Those bearings seem to cause more belt failures than anything else. I don't remember what they cost but I remember they were surprisingly cheap last time I bought some. Was awhile ago though.
Bob
I've got 35k miles on my Monster and as far as I know the bearings are the originals. I check them at least every service interval and they still are fine. I may change them out after this season just for the peace of mind.
I haven't seen it as a line item on a service schedule.