Hi, new to trials and my van is a astra van so the bike has to go on its side. My question is will the fuel / water run out? 

Is there anything I should be doing b4 I place it on its side? 

Thanks phil 

Turn off petrol and drain carburettor or run the engine till it uses up the petrol in the carburettor. It may lose oil from the gearbox breather too depending on which bike. Try leaving it on its side in the garage a few hours and see what comes out. 

would it fit in if you dropped the handle bars?

Could you put it in at an angle?  Maybe get some kind of crate or build a support framework from inexpensive timbers with some padding to at least minimize spill potential?  

Good luck.

Tow bar and Dave Cooper Rack would be my idea ........ 

Thanks all