Is machining the barrel a cheap or cost effective way of gaining some more compression?
Milling the top of the cylinder is the easy way to get the squish clearance set up properly but you won’t be able to raise the compression ratio any significant amount. Taking .010″ off the cylinder is only good for an increase of maybe .2 or so. Take off much more and the piston will contact the head. Not good! If you do increase the compression ratio much you definitely want to set the squish clearance properly. The squish area creates turbulence during combustion which speeds up the burning and decreases the tendency toward detonation. Though milling the head is the easy way of raising the compression, I would suggest welding up the sides of the combustion chamber instead. Why? First, you would increase the available squish area. Second, milling the head (and cylinder) will retard the cam timing. Retarded cam timing can be good for top end power but maybe at the expense of bottom end torque. You could slot the cam gear bolt holes and leave the pin out, but for some reason Suzuki dec
