C4.1 Idle Gears Problem

[nicmo]

I dont see any mention on the forum about idle gears breaking on the Centro often. Back where i race lots of us have this problem, a set of idle gears will last for 2 events or so and then break. I realise that we are running on astro tracks with a lot of grip but in my opinion they break too much.

How about your Centros? Do you also have this issue? What grease do you use?