'Brian quick question how would you find an extra 8 - 10% more power and torque from a GX160?'
hi Gregor, If we go for 5.5hp as std, prepped then I would look for 5 or 6 areas where I could get a tenth of a horsepower. These collective areas would add up to the half horsepower increase you seek.
Typical areas include: # torque hone the cylinder bore # lap piston rings flat # reduce friction on side loading of crankshaft # fit decent valve springs # fit high ratio rocker arms # remove lip sealon crankcase oil seals
that's plenty... but all include adding or removing material...
why do you ask?(I could better tailor my answer if I knew what you were trying to achieve...) Brian P.
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