noise patrol checking in
i received pm and link but unable to study it properly yet. i wanted to check in on public forum in the interest of sharing your worthy experiment. i had a slight misconception regarding original focus of your modifications goals. brief study indicated the inlet size would neck down/reduce muffler inlet from inlet pipe. this is not an uncommon practice. exhaust velocity is sometimes deliberately increased by reducing a muffler inlet size. muffler baffle screen size affects exhaust flow differently than a solid pipe. sound control is affected by baffle screen size and reduced diameter is sometimes required for softer exhaust note. diameter of insert and length of canister are both critical to restriction/back pressure and exhaust note. larger insert makes it more throaty sounding. shorter canister makes exhaust note a bit more raspy. changes to either size in the smallest amount can make huge changes to performance but sometimes do very little to change exhaust sound level. dont be afraid to put a smaller muffler inlet on and experiment. you may find the result surprising. i would offer most riders would prefer a quality exhaust note/sound more than worry about extracting every ounce of power from motor. as long as power is not reduced anywhere and sound level is pleasant to the rider it should be considered a success.
A REAL MANS CREED
If it rolls, burns rubber, flies or shoots, runs on gasoline or gun powder, makes lots of noise, produces recoil or a
rooster tail----it's cool.
But if it uses a ball, a bat, racquet or club, or is played on a court or green by yuppies or liberals----it's a piece of