I meant oil temps not coolant temps. Coolant temps can be over 100c because the system is pressurized.
Oil temps will vary based on where they're being measured. However, oil doesn't hold heat as well as water does.
When I had a Corvette, I could read my coolant, oil, and transmission fluid temperatures at any time. The oil temperature tended to hover near the coolant temperature primarily because the coolant was doing most of the work of moving the heat to the radiator, where it could be transferred to the air. Oil would hover at about 220 degrees while coolant would hover at 195 at freeway speeds.
On our bikes, the whole system is more compact and we have fins and the oil itself to transport heat away from the cylinders, so it's expected that the oil will be hotter. These modern, synthetic oils are a lot more durable than some remember older oils being.
When in doubt, however, I suggest sending an oil sample in for testing at a lab. That way you can see whether the heat is breaking down the oil enough to be a real problem.
