Flex-Hone Cylinder Ball-Hone

The 52-54 mm hone is what you want.

Sure, it works fine on plated cylinders, don't over do it just until you see a cross hatch pattern. Be sure to wash the cylinder with hot soapy water, it removes the honing residue better than solvent. Check your bore with a clean paper towel if it comes out with any dark marks wash it again!

Yes it will work. Make sure that when you insert the hone it's well lubricated with honing oil on the hone and cylinder walls. Also insert only the tip of the hone in the cylinder then turn on your power tool and begin your honing process per the instructions supplied with the hone. It is supposed to have a snug fit in the cylinder so that the honing balls can do their work. Most of all read the instructions to a T and you'll have excellent results. Hope that helps you out.

You won’t have any issue using this on a sleeved cylinder.

Looking at the flex-hone chart, your next size up would be 70mm. Too big. We used the 64mm hone on a Yamaha RD350 with a standard 64mm bore. It was plenty snug. My guess is that you will have enough contact to do an even de-glazeing job on your YZ. We had no issue with the hone buggering up the chamfer on the ports: however, the direction of the hone was evident just by the crispness of the chamfer on the leading edge of the port. We would use this hone again. The ports appeared to have knocked off a lot of the initial abrasive on the hone, and this is normal.

You are right you don`t want to hone the cylinder but you do want to brake the glaze on the cylinder and a ball hone and some honing oil on hone put in cylinder and run from top to bottom with out pulling ore pushing all the way out of cylinder go fairly fast and go up and down 8 to 10 times in about 10 to 15 seconds and then stop and pull honey out! Then wash with soap and water and take clean paper towels with WD40 on them and go up and down in cylinder till it comes out clean then put some of your premix oil on a paper towel and coat the cylinder with it and it is ready to go!

Personally I wouldn’t use a hone on nickasel, and no this won’t fix any out of round etc. will need bored and recoated if out of round. These hones work great on steel cylinders to break the glaze and give nice cross hatch in cylinder for new piston rings to seat.

65-67 should work great, 68-70 may be too tight and put stress on the drill.

Yes, this hone is designed for Nikasil cylinders, it is very important to have the correct size for your bore diameter and use the hone correctly, drill speed RPM and the rate honing up and down inside the bore have to balance to give you a good crosshatch pattern.

To my knowledge this a 350 grit. Twice in an twice out gave my cylinder a perfect pattern. Follow instructions and it is perfect.