Fresh oil and filter, clean all the battery cable ends, clean and repair all ground cables, carb kit (your accelerator pump or whatever that carb has is gone thats why the sputter), and some Marvel Mystery Oil down the carb and in some gas to soften up crust on valves (think about it, some sat open, others closed). Plus its not warmed up yet, you gotta wait for the intake to heat up before fiddling with carb adjustments. Except choke stuff. Doesn't sound like the fast idle feature is working. Find some numbers on that carb and surf it up. The carb probably has some funk hardened in the bowls and tiny passages. Must clean.