Is Your HISUN Loud?

[HISUN Sector 750 EPS Failu]

"Mrs. Smith" doesn't like how loud our Sector 750 is.  On a HISUN forum someone said the same thing about his 750.  I haven't given it much thought because I've been more focused on stuff that has broken.

So, I used my decibel meter to check ours out.  4000 RPM, Low gear, under 20 MPH . . . . 97 decibels.  That's above most ordinances, even state boat noise limits.

AI Overview

Ninety-seven (97) decibels is considered very loud and dangerous to hearing with prolonged exposure, roughly equivalent to a newspaper press, a loud nightclub, or a snowmobile. At this level, damage can occur after just 30 minutes, necessitating hearing protection

[T-boss 410]

I guess you could replace the muffler, or add another small muffler to reduce the sound. I have a Massimo T-Boss 410, and it's louder than some UTV's, but not so loud as to violate any laws. I'm sure there's something out there in the aftermarket that will solve the problem.

[HISUN Sector 750 EPS Failu]

25 minutes ago, T-boss 410 said:

I guess you could replace the muffler, or add another small muffler to reduce the sound. I have a Massimo T-Boss 410, and it's louder than some UTV's, but not so loud as to violate any laws. I'm sure there's something out there in the aftermarket that will solve the problem.

Maybe on a day I'm not replacing the driveshaft! 😝

[T-boss 410]

Oh sorry, my bad.

[Joe Breaux]

My 500 is not very loud

[HISUN Sector 750 EPS Failu]

My phone has the DB app, so I set it on the passenger seat and went for a ride.  4000 RPM, 20 MPH.  101 decibels!  That violates most noise ordinances.

[Joe Breaux]

I m sure mine is no where near that

[HISUN Sector 750 EPS Failu]

11 hours ago, Joe Breaux said:

I m sure mine is no where near that

Put a DB app on your phone, and find out.  It's free.

[Joe Breaux]

I ll try it next time im at my camp...but you can talk normally over it at 25mph..so it cant be that loud. No louder  than my C FORCE 600

[Alien10]

Hisuns seem to be a noisy machine. At least my SxS is,  as there are zero sound deadening mats anywhere. Every flat surface serves to transmit engine roar and vibration.    Their engines seem to have heavy vibration and that transfers into the frame and then body components.   On my 550 UTV, the engine half sticks out behind the cab, and it is difficult to mitigate noise entering the cab. 

 

Just a thought here, this won't help with external noise, but you might consider sound deadening under the cab.  Kilmat is one brand of self adhesive sound deadener that might help somewhat with noise inside the cab.