The id measurement of the head pipes on my cb/cl350 is 1 1/4". If I were to run these into mufflers id measurement of 1", what kind of issues would I run into? Several mentions have been made here as to the lack of benefits running less restrictive exhaust systems on 350s, since they require some back pressure. My motor is stock with velocity stacks & no filters (a no-no I'm aware of). The mufflers are from a Kawasaki ex250, and I have no idea how restrictive they are.