Restricting the baffle will most likely cause power loss. You could check HMF, they had slipon mufflers for the YZ, and I'm pretty sure you could buy a Quiet Core for whatever exhaust you bought. They advertise their Quiet muffler to be pretty good noise reduction, without bad power loss. :hmmm:
The fella I purchased my bike from, said my HMF was considerably more quiet than whatever he was running. Not a shameless plug, just trying to send out options.
The fella I purchased my bike from, said my HMF was considerably more quiet than whatever he was running. Not a shameless plug, just trying to send out options.