Brush Research FLEX-HONE Cylinder Hone, BC Series, Silicon Carbide Abrasive, 3 (76 mm) Diameter, 240 Grit Size

Used this to hone both cylinders of a 22 hp Briggs VTwin lawn tractor engine that needed a new connecting rod, a new piston and 2 sets of rings. Honing the cylinders is needed to allow the rings to break in and seat properly. Since I don’t expect to do this regularly I was between a cheap set of honing stones for around $20 and the Flex hone which I’d seen on YouTube and was selling on Amazon for $37. The reviews on the honing stones were terrible (cheaply made and inconsistent result) and the flex tool reviews while not numerous were mostly positive. Several excellent YouTube videos by the manufacturer and a call to the seller about whether the 3 inch (180 grit) tool would be good for my 2.96 inch cylinder convinced me it would be worth the extra cost for the Flex hone tool. What a FANTASTIC result in less than 10 minutes to do both cylinders following the video instructions of coating the tool with clean oil and moving in and out of each cylinder for 1 minute. Perfect cross hatched pattern on both. Great tool and good value considering the $200 of parts and many hours of labor to complete this project.

Worked great

East to use great tool for the price.

Was easy to use

Used the 3” 240 grit. Did an amazing job on the steel sleeves in this machine for a set of SPI pistons. Compression and performance are still spot on after 800 miles of use. Definitely would recommend.

I was putting in new rings, but had a glaze on the cylinder bore. this quickly removed the glaze and will allow the new rings to seat properly.

Perfect product, great description about getting the right size for my cylinder. Thanks

Wow, I didnt know how great a tool this was! Perfect honing and amazing product engineering.

This is an easy way to remove a small amount of metal from cylinders. It creates a smooth surface. I would recommend this item to others who wish to enlarge the inside of a cylinder.

This is a great upgrade over regular 3 blade hones, especially for those that dont have much experience with regular hones. This hone is very easy to use and works very well, make sure you use a good lubricant while you hone, 10w30 oil is what I used. The one major downside to this and any other ball hone, over a regular hone, is that you can only use this hone for the specific size cylinders. Where 3 blade hones can be used for several different size cylinder bores. Other than that I would highly recommend this hone, it worked flawlessly for me.