Reading In the CSC Baja blog about the bloke who lost his counter shaft sprocket nut I was a little surprised.
Not by the loss of the nut, but the fact that it was a nut and not a bolt.
Though I know the CSC RX3 has a number of upgrades / differences to the Honley RX3 (UK), I thought the engines were exactly the same.
This appears to not be the case
CSC RX3
Honley RX3