Harley to recall 46,000 motorcycles

[TheHelios]

http://www.msn.com/en-us/money/companies/harley-recalls-nearly-46000-motorcycles/ar-AAbD34r

Harley says in documents that gas bubbles can cause the clutch master cylinder to lose its ability to fully disengage the clutch,

Ouch. That's an urgent recall if I've ever heard one. So what would cause and fix this issue? Simply a rebuild or something more intensive?




Edit: Just noticed this is from 4/24/2015 :