drilling the muffler
and opening up the air box.
it looks like the air box sucked hot air from between the cylinders to meet noise regulations
yamaha v star 950 performance mods
yep, i double checked, it is half inch bit.Based on your last post you're saying that the hole that you drilled in the exhaust is 13mm?
If that's the case then a ½" drill bit will work.
If I'm wrong please correct me. Thanks