Reread my last post. You don't absolutely need to buy a leak-down set up if you don't think you'll need it enough. As far as balancing the carbs there's a device called a "Unisync (sic ?) if they still are made and you can find one. I've tuned literally hundreds of race cars with one of those. What it does is you place it over the intake opening of the carb. and it measures the air passing by on a scale. So all you do is adjust the carbs so the little ball in the measuring tube is the same for all four carbs. If I remember Summit Racing used to have them. If they're still made they're not that costly. This said at one time I have taken a chunk of hose and just listened to the sucking noise that the carb makes and made them all equal. It's not perfect but will get you by if you have a good ear for this kind of thing. At the very least you cam get it running fairly well this way.I have compression tester.i don't have leak down. I can get it to fart and pop when trying to start. I cleared and cleaned the float bowls and adjusted all floats to 26mm spec. I know I'm hoping for 90%compression and 10% difference. The leak down will be the hardest part. I have not pulled the carbs off the rack and checked the needles. That's actually what I'm a bit afraid of because syncing them seems like a bitch. I want to get it running and then I will start working on chain, brakes, wiring etc. So next I'll do compression test...then what do you recommend? Leak down or check needles?
2 X on having a workshop manual for every bike you own. I do exactly that unless I'm just passing it on and even then Ioften hate not having one and always running back into the office to look something up. If you are keeping it do as TR says and get a shop manual.