Over heating

The puking coolant thing can be negated a little too by dropping the fan switch to 95°C or maybe even 90, though 90 feels wrong somehow. I can't explain why it feels wrong - it just does.

Interestingly KTM make two types of cap (not referring to pressures here) - The sort of weird round one we have on the R3 and the more standard looking cap that Rob found. The more standard one looks better engineered imo.