Oil lines/pipes removal

[Mauricedonini]

Hi

1988 Ducati Paso 750 with a bad starter.

Trying to remove the oil lines/pipes on the right side of the motorcycle. After a day of lubricant they won't move. Not sure how much heat can be used since the lines/pipes are rubber.

Given their location, thinking the only usable tool is a wrench.

Any suggestions/tips/hints - especially from those that have succeeded.

Thank you