Originally Posted by motorollie
The 520 has a standard fuel tank of 8.5ltr? You need a 150km fuel range, so I think you need a bigger fuel tank or a small extra tank.
True, I've fitted an 11 litre Clarke tank... something like 3 gallons IIRC, and not compatible with radiator fan kit.
With a conservative throttle hand (Lord knows the 520 needs it) I can get up to 170kms till dry.