I "think" 3 is enough ... but what if my dealer "blunders" and need's a bit more. Maybe 4 litre is more on the safe side.. hmm :confused:

It all depends on what you are putting in.

If its DOT 5 and above you will probably need 4 or 5 litres to make sure the system is fully flushed.

If it is Super DOT 4, you'll be OK with 2 as it is compatible and the flushing isn't quite as critical. System capacity is only about 1.75l IIRC

It's Motul RBF 600 i'm putting in.. is that super DOT 4?

edit: NORMES : FMVSS 116 DOT 4 / SAE J 1703 / ISO 4925

Yep, its DOT 4, not sure if its the super which has a higher wet and dry boiling poiunt than the DOT 5