Sorry about the dual post, can't seem to edit the one above.
We use a BMW safari jacket, good impact protection, lots of zip vents, lots of external pockets and a couple of waterproof internal pockets, but don't bother with the liners. Really should use their pants as well, but use our dragging jeans and run the risk of no hip and knee padding. Some guys up there use external knee pads, probably a good idea. Open face helmets are a bad idea re bugs, plenty of flip up helmet choices around. Bring your own! Good quality summer gloves with mesh and impact protection, they will dry quickly if they get wet. Just watch the sunburn through the mesh. And a big floppy hat, the crushable leather ones are good.
The real trick is getting the long haired navigator to pack light. That's why she gets the big bag.
I have a really good puncture repair kit with a mini compressor that I got from the US, and a tin of finnileak bought in country is all you need there. Think through your first aid kit. Paraderm plus is great for insect bites and burns, small spray can of bush mans with deet is good for mossies, Swiss army knife, some waterproof bandaids, some gauze pads and a couple of long gauze bandages, and a packet of Panadol is enough for small stuff, use a t shirt for bigger injuries.
Go easy on the toiletries, you can get everything you need at the 7-11, but get your sunscreen from Oz.
IPhone loaded with a bunch of books gives You something to do in the evenings that you are not in the bars, and Internet where you can find free wifi,
As the guys mention, clothes are easy to buy and cheap, we always come back with twice as much as we left with.
Sorry if I have rambled on a lot here, but better for you if I give you too much info that you already know than not enough. Pm me if you have any more questions.
Have fun, wish I was back up there soon.