| Not read every reply but if a 583cc bike entered in both classes it should mean the race order should always be 583 class followed by the 620 class, otherwise in the case where the two classes follow on from each other it would not only be the advantge of extra track time but also coming to the grid with pre warmed tyres.
Which would certainly give an advantage over the other 583s if someone had just been out with the 620s and yes if the 583 class was first up then those bikes would carry the same advantage of warm tyres onto the 620 grid, although with the power difference the advantage of warm tyres on a 583 is not going to have the same effect. | 
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