Fitted the Denali Soundbomb mini. Relatively easy 20 minute job, had to bend the stock bracket forward a tad to clear the radiator guard at full left lock. To me the sound is about 30% louder but with a much lower penetrating tone which is more effective than the stock which belongs on a bicycle. Couldn't hear the stock when cruising along but can hear the Denali quite clearly so worthwhile upgrade without the need to add relays etc.