Scooterotica

How can i convert the oil tank in my Cometa petrol tank to let in petrol? I realise i have to puncture it somehow to let fuel in but i'm a bit stuck as to how. I suppose i could use a dremmel through the tap outlet and that would give a "bottom" fuel escape but it will need at least another if not 2 ways of letting fuel in. Any sugestions how this could be done ,all through the oil cap opening:? Oh and i dont have the outlet for the oil tank as it was brazed over when i got it.
Thanks

Can you fit fuel tube straight to the oil tank? With appropriate fuel switch it might act as reserve (so there's no need for use the reserve of the actual fuel tank). Negative side of this conversion is that you have to mix oil to two different tanks.