Removing material from the combustion chamber in the head is an old long-standing method of lowering the compression in the motorcycle world. I had that done to my Kawasaki in 1969 and it worked just fine. I needed to have that mod done because that engine was suffering from pre-ignition, which was caused by too much compression. It ran like a champ after the fix.

 

[QUOTE]Originally posted by Psicho54
[B]

That sounds like some tricky handywork there man.

 

[QUOTE]Originally posted by S2kRob
[B]

You most certainly won't gain more torque.