sunday stem slippage

[Bunky]

I've got Sunday stems on 4 different bikes right now and they're all awesome.

If you've got the painted version of the stem, just sand the paint off the clamping area. 

Depending on your bars, you should maybe use some stripper on the clamping area too.  Can you show us some pictures of what the inside of the stem and what the bar clamping area look like?

[LayLow]

I've ran a few of these stems without any issues. Painted ones as well. I'd say your bars are crushed mate.

[Zoidberg]

 should have put this up ages ago

i filed the inside of the stem a bit, cleaned the gunk off the bars and put some fibre grip (which is grippy paste to put on carbon fibre parts) in there for the fuck of it and it seems to have solved the problem

still not taken it down the park properly yet but it's been fine jumping about

i did both sides and the top aswell:

[smalley]

Ive got an atilla front load if anyone wants it