2006 Suzuki Boulevard M50K6, bike stalls when RPM drops
Hello forum, a Boulevard owner from hated Russia is here. I beg for your help: recently bought my first bike with 21 thousand miles mileage, mileage at the moment is about 22 thousand miles. About 100 miles ago a problem happened: if I abruptly rev up on neutral and then drop RPM, bike starts choking and then completely stalls. After that I can't start the engine for about 5-7 minutes (starter is spinning but nothing happens), but after 7 minutes it starts as usual. I don't think that russian Ivans can help me with this problem, also there is no Suzuki service in my area at all. Could the problem lie in old spark plugs? They should be pretty old, but I have no idea if previous owner had ever replaced them or not.
My deepest apologies for my english, it's quite hard to practice english in Russia nowadays.