Hi all,
I have a spare 200cc cylinder/piston/rings set lying around and the cylinder is lightly scored from a cease. The piston looks fine save for a few very very light scratches by the exhaust port but I'd like to make it a working kit so that if needed, I can have it ready to install if/when the time comes.
I also picked up a honing bit really cheap at a Harbor Freight store sale this past weekend. This bit has the three arms that press outward on the cylinder wall and an adjustable collar with a spring to put more or less outward pressure on the stones.
This cylinder that I'd like to hone is at 3rd oversize (66.9) already. I remember when I got this kit together, I also got the 3rd oversize piston ring kit and a 3rd oversize piston. I recall the rings not needing to be filed down because the rig gap was at the minimum gap, so I left it as it was.
Questions:
A. Now that I am going to hone the cylinder wall to get past the scratches, do I need 3rd oversize or 4th oversize?
B. I'm guessing I can re-use the 3rd oversize piston I have, but do I need to get a 4th oversize piston if I get the 4th oversize rings?
Thanks in advance