But if that 750 Virago was such a good seller 1997 yamaha virago 750 recurring problem with what seems to be ignition system have cleaned carbs and gas tank have replaced igniter have replaced one coil front cylinder still missfiring rear cylinder never a problem. It simply unscrews off of the end of the plug wire. Once the bike is back in use, the sludge-clogged components interfere with the fuel’s bath, and the bike is “starved” of fuel. Originally sold with a 750 cc (46 cu in) engine in 1981, Yamaha soon added 500 cc (31 cu in) and 920 cubic centimetres (56 cu in) versions.