Oil-less forks

G'day, I've just bought a second hand minibike. 2006, I think it's an AMS brand. It has a DUCAR engine. Completely stock. Been hardly ridden (apparently). It goes ok except for the front forks - They are non USD and they don't seem to spring all the way back up under its own weight. I've had a bit of a look and it looks like they don't have any oil in them at all. I've pulled them (the forks ) out and unscrewed the top cap and inspected the spring etc. To my amazement, there is no oil to be seen. Is this unusual for these Chinese bikes to have oil-less front forks?
Removing the rubber plug at the botom of the fork I can see there is an air valve at the bottom. I've tried pumping a bit of air in but it doesn't seem to build any pressure and/or help the situation.
Any ideas anyone?

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Running out of room in the garage..
2 x El-Cheapo Chinese mini-bikes (2006 Atomik 125 look-alike and 2006 Sahara 110)
2 x Suzi DRZ 400's - 2000 and 2007,
1 x Suzi DR 350,
1 x Honda Big Red ATV

Hey man the valve at the bottom is for gas not air, You can get them re gassed and i think they also run oil. Might be worth getting new forks if there crappy and your guna do big jumps

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Scattered no logic

I've never heard of them being charged with gas before... Rear shock yes but not front forks! Sounds like the forks are shot then. I can't see me spending $$ on getting them replaced so I'l probably put up with them sagging a bit.
Cheers,
tRev.

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Running out of room in the garage..
2 x El-Cheapo Chinese mini-bikes (2006 Atomik 125 look-alike and 2006 Sahara 110)
2 x Suzi DRZ 400's - 2000 and 2007,
1 x Suzi DR 350,
1 x Honda Big Red ATV

put some fork oil in them. you will wreck them even more if you don't. you will find improvement just with that.

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Cheap & Fast, won't be very Reliable
Cheap & Reliable, won't be as Fast
Fast & Reliable, sure won't come Cheap

I tried putting some fork oil in. It ended up squirting out through the breather holes in the top caps.. all over the place. LOL.
Have a look at the type of forks I have (they are the upside down type.)
Atomik Motorsports.

__________________
Running out of room in the garage..
2 x El-Cheapo Chinese mini-bikes (2006 Atomik 125 look-alike and 2006 Sahara 110)
2 x Suzi DRZ 400's - 2000 and 2007,
1 x Suzi DR 350,
1 x Honda Big Red ATV