How is the sound of the Hero Hastur 620 and can we put extra vibrational sound silencer…..like R1 and Hayabusa?

How is the sound of the Hero Hastur 620 and can we put extra vibrational sound silencer…..like R1 and Hayabusa?

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kiran.s - 0 Rep. September 7, 2015

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kiran.s - asked September 7, 2015