Pro Clone vs Clone

MAS

Member
What is the difference between clone and pro clone? I see some series’ running clone classes and pro clone classes. I’m also curious of the difference in wka rules vs akra
 
Usually the pro clone is the “money” race with higher entry free. Clone is for everyone who doesn’t want run Pro and pay the higher entry fees or if you want to run two classes.
 
Cam and head
Is there anywhere that I can go to find rules on this? I’ve heard a rumour that our track will be running wka rules for clones next year ( we’ve only ever run flat heads). Is head porting allowed with wka?
 
At this point in time wka uses nka engine rules. Those rules do not allow porting
 
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