I'm no guru, but...
The CRF230 motor is quite different to the old XR200 motor - and not just because they've got the electric leg and the extra capacity. Even if you ignore those, you'd struggle to justify calling them a carry-over part.
Arguably, if it's going into an Evo bike, you could get away with calling it a 2012 model Slaker 230, but you'd want to have balls of steel if you try that.
If its for a pre-85 or pre-90 bike, your only real hope is that your local scrutineers and fellow competitors simply don't care...