If the hubs are a bit draggy check the bearings. The CK bearings are serviceable but they tend to lose grease.
Pop out bearings. Remove seal with stanley knife. Rinse out bearing with spray degreaser a few times. Rinse with water. Dry with compressed air. Reapply grease. I use the Finish Line ceramic grease on my CK bb and it works well.
I'm told you don't need the CK tool, instructions are on youtube.
Also check the star ratchet. CK specify their ringdrive fluid but there have been reports of it leaking out. Dumondtech make a special ratchet grease that Stans, I9 and a few others reccomend which doesn't leak.
https://www.bike24.com/p2154055.html
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