Anybody else here with M4 gp?




Blacksmith

Registered
I have the M4 gp mount exhaust (I know, Busas are meant to have duals I didn't put it on) and I like the look and weight savings but I'm wondering if the factory installed stage 1 quiet insert restricts airflow and therefore power. The inserts go from a Q1 to Q9 but I can't find info on what's better for performance vs sound. I wont go very loud just for an extra pony or two but I'd like to know what the options are
 

GAmedic

Registered
I've never seen M4 offer that full system with that muffler. Only that muffler in slip on variation. M4 does offer a full system with titanium muffler for our bike.
 

Odin

Registered
From descriptions on various websites

You can expect a db reduction that ranges from 1-2 db on a Stage 1 Quiet Insert and 3-4 db Stage 2 Quiet Insert. Please understand that every bike is unique which influences the db reduction of the M4 Quiet Insert from one motorcycle model to the next.
 



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