Need help on ball hone.

[Gregpaulc]

657x cylinders say 1.00 over. The factory bore was 78mn. I'm assuming they are 79 mm from a rebuild. Also have a 1995 spi with 587 motor. Factory bore says there 76mn. The cylinders have 75.9 on them. In assuming that is the factory motor. My question is what size ball hone do I get and can I get 1 ball hone for both skies. Both skies have really smooth cylinders. I have a little bit of rust discoloration on cylinder walls in both sea doos. Also wondering if I need to put new rings on cylinders since I removed the cylinder jugs. Thanks for any input

 

[etemplet]

I'd measure the pistons, they are probably worn and measure the exact bore sizes, check for taper and out of round.