Have someone who knows that bike inside and out look at and ride the bike. They should be able to provide you with an opinion as to its condition. The salvage is only a paperwork issue that allows insurance companies to shed liability and to let buyers know of previous damage.
There are many great previously salvaged bikes on the road, and you'd be surprised at how little it can take to have a claim that results in salvage. When it's time for all the paperwork to be done, and it has been inspected by law enforcement, it will have a rebuilt title. If you look at the requirements for salvage certificates and rebuilt vehicles, you will see that there should be many more of them out there than there are currently. Many customized and restored vehicles should have salvage certificates or rebuilt titles as the law requires, but these are mainly used by insurance companies. As long as the bike is solid, and the price is right, jump on it. Don't go I to it thinking you will buy the bike cheap and then sell it for retail making a huge profit, that's not likely, but that also doesn't mean that its not still a great bike.
I've owned many previously salvaged vehicles that have been great cars. I once had an outboard that was salvage. it had a cracked lower unit. I sold it to a friend who put a jet lower on it and ran it for years. Always disclose the rebuilt title to future buyers so as not to open yourself up to a non disclosure claim. As long as you don't hide the facts, a buyer has no claim. Always get their signature on a form disclosing the rebuilt status for your protection.
The bikes title will be forever "branded" with a notation that says rebuilt on the title itself, otherwise it will look no different than any other title. A salvage certificate is not a title and requires several accompanying documents to be converted back to a title. Without all those documents and possibly some receipts, you may have trouble or it could be impossible to get a rebuilt title. Know what your buying, and get all the documentation. If the bike already has a branded title, you should be good to go.
Is the bike on a salvage certificate, or a rebuilt title? Two different things. Also some states have limited salvage certificates that only allow the vehicle to be parted out and can never be re titled for road use. Sometimes vehicles with non-rebuildable titles can make great hunting buggies if the price is right. Again, know what your buying, and if it checks out have fun with it.