Experts pls advise plugs for city vario
According to the Manufacture Manual where specs mentioned of plugs NGK BKR6E-11 and suggested Gap is 1.1mm
But in the market plugs are available NGK BKR6EY-11 I am little bit confusing about Y as shop guy said there is a groove on tip for give more spark, is it true?.and also bosch brand plugs are available and mentioned 1.1 mm gap on box which I attracted
so pls advise which one is good for my city vario?
Thanks