The master cylinder is clean inside and the plunger is free but it will no doubt need a rebuild kit as will the calipers. The big allen bolts on calipers are not stuck and disassembly of the calipers will be a snap.The brake pads have plenty of remaining life in them. The rubber lines have NO leaks or cracking and have no damage. One of the bleeder nipples is free but one has been broken off and will need to be extracted. This setup is correct for the 1973 GT750K only. The item "Complete Front Brake System for 1973 Suzuki GT750 GT750K Dual Disc Calipers (10)" is in sale since Sunday, April 26, 2020. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Antique, Vintage, Historic". The seller is "cju59" and is located in Kennesaw, Georgia. This item can be shipped worldwide.