Tech Articles

1 Cylinder Bores for K-series Kohler

Posted by Julian Stahl on

How big can you bore a stock block. 10-12 Block biggest you can bore is 50 over on old style which is 3.420.The newer style blocks can go 3.530 for 14HP Largest valve for 10HP Intake1.850 Exhaust 1.50. Measure cylinder wall by using calipers between finsand inside diameter of cylinder.16 HP stock can be bored 30 over 3.780 to 3.937. Head strap is needed!18HP Blocks K361 can be bored to 3-15/16 must have head supports.  Link to pistons Click here to video

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