aoa guys guys i want to ask i have a euro 2 model 125 and it has dp8er plug as a stock which does misfire when i ride above 60kmph so i took my bike to mechanic and he said that put dp8ea plug in it i have tried it and its not doing misfire anymore but sound is little bit changed to a classic non euro cg125 so my question is will it harm the engine if i keep using this plug ?or should i use the stock plug dpr8ea with blue reading euro plug i feel the dp8ea is good? should i use the R one or dp8ea?