Used a stanley pop rivetter and had the same problem. Seems that the stalk is not that hard and the grooves in the tool dig into the stalk but the tool in relation to the stalk moves so they aren't pulled to the point where they snap. The grooves in the tool that grip the stalk seemed to fill up with swarf and had to dismantle the tool each time. Went to protwins and they had an old looking rivet tool and it worked fine.
Bikes: R1200RT F800GS. Hopefully another Ducati soon
Posts: 2,526
Join Date: Apr 2005
Its almost certainly got to be the tool, usually those that can be bought from B & Q, Halfords are rubbish, I know I have broken several. I usually borrow one from a friend who has a professional riveter that cost £200