Bearing down

[steeeve66]

It can depend on a lot of factors and isn't purely based on mileage. Age, type of usage (always 2 up?), care etc etc.

A couple of things to note: -

- Pressure washers if not used carefully can dry bearings out.
- Lack of usage can harm bearings as leaving the bike resting for months on end puts all that load onto 1 point of the bearing for a long time, best to leave bike on centre stand and front paddock stand keeping wheels off the ground
- Have the bearings previously been replaced? If so, cheapo parts?
- Winter riding and lack of care, salted seized my sprocket carrier bearing on my FZS600 about 30,000 miles ago.

Not much help but maybe 1 or 2 of these points strikes a chord with you and helps you understand why yours has failed?

Brace

Cheers for the response,  I never use pressure washers on bikes and am pretty fastidious about care but the lack of use point might ring true - bike was laid-up through most of winter in a slightly damp garage, I can well imagine moisture making its way past the seals and staying there possibly causing problems despite being on the centre stand. I think the failed bearing was the original. New ones in now (I replaced all three at the back) and hopefully I'll get more than 20k out of them!
S