I wish my bike ran on LPG!

[Oakie]

ohhh coool...first he/she kiwibiker

'ere! No 'she' bits down there. Just got the boy bits disconnected.

[speights_bud]

Sure an Lpg bike would work fine. But when you 'fill' a lpg cylinder you are not completly filling it with gas. An lpg cylinder has 80% of its capacity filled with liquid petroleum gas, then the remaining 20% allows for expansion of the cylinder contents due to outdoor temperature change. Inside the cylider has two valves, like your bike tank except from the top instead of bottom. One outlet for the gas as it is drawn out to be put through the carbs or out into the BBQ. The other is the overflow, so should the contents over heat or be over filled then the valve will allow the excess to escape.
There are 2 main problems, when you are riding liquid inside the cylinder may end up where it is not supposed to be, liquid through lines instead of gas and out the overflow. The second is leaks, apart from the obvious explosion risks. When the gas is released onto skin it almost instantly freezes it solid. Something i wouldn't fancy happening between my legs . I have had Lpg leaking onto thick 'approved' gloves and its still quite uncomfortably cold.
Apart from that i don't see why it wouldn't work, would be pretty clean burning, less likely to be affected by petrol prices and no doubt 'different'.
It's been a while since my course in lpg but i'm hoping i remembered some stuff right.

[BNZ]

Na mate, LPG sounds way too easy. Make your bike run on water, and make sure the only waste product is beer or rum. Then you will be the man

[steved]

The only problem that I can think of would be making the right shaped tank to fit in the bike without being obtrusive. Do LGP tanks have to be rounded, so to speak?

The tanks tend to be circular due to the inherent strength of the shape. It would be difficult to get away from this due to the high pressures inside the tank.