Yep. That idler has two different sized gears. Under acceleration, it sucks the big gear (IIRC...could be the other way around but the point is the same) into the can and crank gear. Lift off the throttle and the floater slams the small gear back into the cam and crank gear.
I don't recall how much the timing changes between the gears but it was more than I liked. Certainly more than even a timing chain.
Bad news. As a long time family friend told me long ago...junk is junk at ANY price.
