I have a 78 gl1000 engine in my 83 aspy. The cylinder walls on the left rear cylinder seem bad. I run my fingers in there and I can feel bumps. All other cylinders are good. Can I hone the cylinder with the piston all the way down? I can see where the "bumpies" stop, they do not go all the way to the bottom. Not easy to see in these pics, I REALLY don't want to split the case, everything looks very good inside.