Home Forums Tech Talk Piston to Cylinder Clearance Reply To: Piston to Cylinder Clearance


Christian Fox

What Greg said. 01″ is double what you would want for an iron bore cylinder, let alone the Nikasil cylinder you have on your TM. The recommended clearance is .07 to .075mm for that motor, or about .0028″. Either way, if your motor stuck, you’ll want to have the cylinder honed before you fit a new piston, so don’t even bother measuring now. To do it right you need a good dial bore gauge and a nice micrometer, or preferably a calibration ring.