How to make a Honda grom quieter then stock?

How to make a Honda grom quieter then stock? - 1

Don't start it?

There are aftermarket silencers that can be fiberglass repacked (used a lot on 2-stroke dirt-bikes) so take a measurement/diameter of the exhast pipe and see what will fit it.

Check back of muffler and see if it has a little stub at least 1/2 inch long about 30mm diameter- then go to local ATV and dirt bike dealer and ask about spark arrestors DNR legal for Forest Service and parks trails. A fairly simple, quieter, easy to mount kit for about $20.00 to $30.00 fits on the stub pipes, larger pipes get bushings removed or added, clamps go over end of some mufflers, others mounting kits with flange fittings. A early VW Beetle 'stinger' can be fitted sometimes- I used a pair in BSA open mufflers to quiet things a bit more- 32 or 36mm? 1 and 3/8 inch? The old VW 'stingers are fiberglass mini resonators that will stop a lot of 'barking', make it a longer, muted sputter. Another thing is use a fiber and hard rubber spacer on muffler mount to reduce vibration- this is stock on some cruisers. Check local scooter shops and look for the older last of 2 stroke muffler extensions from a Adli, Yamaha, or Kymco- little added mini mufflers for American market noise laws, simple U shape mount and you exhaust on small can- makes exhaust do a snake dance, S with small expansion chamber in middle that slows exhaust 'pulse' . Fish tail extension with a baffle flap set will quiet some thing down enough to get through some inspections when added to some straight pipes- some small fishtails for little cycles and scooters in some catalogs- can use a 4 to 6 inch piece of exhaust pipe fitted over end of stock, do a 45 degree cut and then squeeze cut end to 1/2 the regular output diameter, do a slight up bend so close part looks like a bit of fish tail with shark fin up or bend down first then squeeze