The Euro2 engine takes about 650ml. The 3 is probably pretty close to the same.
For coolant I've been running the PDI coolant made for mini race bikes.
For the brakes I also run Motul.
For pre-mix the Motul 800 is great—there is a road race version formulated for high RPMs if you can find it. If you live in a warm climate you can run this with injectors, but if you live where it gets could it's probably better to run 710 or something made for injectors. I will also run Redline, or Castrol. Basically any good oil is fine with these bikes. One year it actually got cold around here, and so I sourced a case of snowmobile oil.
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