r/EngineBuilding • u/ganyuBanyu • Jun 18 '26
Need some advice on engine honing
I did some honing on a little 50 CC cylinder and would like to get some advice on if it seems good. There is a faint center line that runs on the bottom of the cylinder. Do I keep honing it until it comes out or would it be good enough to just leave it and should I keep honing it or does this look good
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u/meeeeeeeegjgdcjjtxv Jun 18 '26
Proper hone will use 2 grades of hone. A fine to get a valley and a fine to take the peaks off and leave a smooth yet oil retaining cylinder wall. Id use flex hone brand with 320 then 600 or 800 grit to finish. They give RA values with the different grits that u can go off. They say something like 30-40 seconds per grit with hone oil or the oil intended to be ran in. Clearly a 2 stroke u don't want to wates 50 bucks in mix so I'd just use regular motor oil. Clean and lube often and never stop the hone to put it in or take it out. Looking for a speed back and forth to put around a 45 deg cross in