cylinder walls bad

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PeterDas

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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.
 

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The problem is that the rings have worn, or seated, to the shape of the cylinder walls. If you hone them without replacing the rings, there will be gaps where the "bumpies" used to be, and you'll lose compression and burn oil. Eventually it should seal, but that might take some time.

If head gaskets were easy and cheap to get for these, I'd say experiment with it, but they're not, so I would do it right if I were you. JMHO...
 
What Steve said :good: , I do know what you have there..I had a Willy with similar looking cylinders and it did run well, no smoke or problems, even the compression was good for an old used motor..I think scores going up and down the cylinder is worse then what you have but all said it is still a gamble, maybe buy some budget head gaskets like Dan Filipi did and give it a try.
 
Thank you for the reply Steve83. I have had the radiator re-done at a radiator shop. I am in the process of cleaning up the entire engine, there was a lot of junk (white lumpy stuff) in the cooling system. I as planning on replacing the water pump, as well as all "O" rings and gaskets. My dilema is this was the engine from my 83 Aspy ( installed by a PO ), I bought a 79 gl1000 which runs, with a single carb conversion. I was going to keep both bikes ridable. I wonder if I might just be better off using the engine from the 79, and keep the 78 for spare parts. Hate to break up a running bike, but 1100's are hard to find for the 83... The engine I have apart looks very good except for that one piston, maybe having a spare engine would be good. I know I'm all over the place, just have to figure this all out...
 
that slylinder will be fine if you dont hone it ... and do it by hand .. problem with honing is ..it runs at speed and ramps off hiegh spots and glazing and drives downinto low spots ...and in no way stay in the shape the rings will ..compounded by the fact that hones cut bare metal easier than glaze ....i never use hones for this reason ever... but if you touch as only a hand can do you could do a lot of good ... but i must say most seem incapable to do so ... reality is if you dont use torque the pushes down lower than the surface its impossible to dig out low spots plain and simple ... and everythin above that level is in truble and will come out ... it takes time and your has to be like skating on the surface ... my bike hooch was much worst then your motor by far ... the other motor i did recently was much worst than the hooch motor both came out well
 
I would knock the high points off by hand with 220 sandpaper followed up with 400 wet sand with trans fluid, clean well then put it together.
Like Joe said, a lot of this job is in the 'feel'.
 

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