A few interesting threads have developed in the karting forums. One is a thread about an engine recall from Rotax for Junior max engines – some cylinders have been found to be a bit outside of the standard tolerances and Rotax is offering a free replacement to owners of a cylinder that is out-of-spec.
Another discussion which started on Yamaha-KT engine pricing has developed into a discussion about different engines being used in competition – is it more important to go fast or to have close racing – can you have both? Check that thread here.