Wow no one even offered the obvious answer...the one way is slipping. Remove and clean the one way with nitro cleaner or denatured alcohol, re-install and all should be fine.
One way bearings tend to slip after break in due to the extra rich settings.
You must be blind? Did you not see my post? or The Boss's post?
Well i made a little spelling mistake on mine i accidently said "dheck your on way bearing" i ment "check your one way bearing"