Originally Posted by SirHustlerEsq

Loosen with allen/hex wrench, invert, shake.

Originally Posted by dvdslw

That little piece is very important, it expands as you tighten the top cap. It my fall out if you flip the bike on the seat and handlebars with a little tap because with the bolt removed it should be decompressed. I found this style of top cap/expansion plug for the carbon steer tube to be a bit tricky at first but once you figure it out, no problem. Here's a picture of what should be in there (2nd from left minus the top bolt) http://www.cannondaleexperts.com/Can...155_p_530.html