Originally Posted by LS614
The piston actually would be moving in the engine because it is idling,
Hehehe, thought you meant with the motor off the piston was rattling around ;-}
Note you can get a little more coaster brake performance if you pull off the 18 tooth rear sprocket and put on a 19 or even a 20.
As a bonus it's easier to pedal up to speed put you'll need to do chain work ;-}