Big Valves

Does changing from stock head to big valve head will decrease the vibration of the engine? Is there really a big difference in performance in using big valves compared to stock? My current set is: 62mm Bore, Vixion VS, Faito Turbo Cam, 28mm Carb, Protec Ignition Coil, BRT Hyperband CDI, LHK clutch springs, YYpang shorty big elbow, 15/42 sprocket combi...STOCK HEAD...comments ..suggestions are welcome...Tnx



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