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Eh personally if it was mine I would just bore it .10 over just to be safe. Send both in and have both bored .10 to a place like Indy Specialties or US Chrome or SLP and if you buy the pistons/rings from them they will then match them up perfectly to the cylinders you sent in to be bored over.

But you can try to hone it and see what happens. If it is just a light scratch it might come out but if it grooved it any then no honing won't take it out.
 

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Discussion Starter · #3 ·
Thanks for the reply, my nephew cant afford to get new pistons right now and pay for boring. I can just barely catch my fingernail on the scratches and they do no go all the way to the top. Im going to try a new piston and rings and see what type of compression i get
 

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Honers have grits ranging from rough around 80-100 to fine around 300 and above just like sand paper. What make and model is the honer? Should be some way to find out what it came with and if you can replace them with different grits.
 

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If you can snag you fingernail on it, bore it
I would use plenty of WD40 and hone it for a minute or even two
Then see what it looks like
Boreing jugs can be done at any local Auto Machine shop
Just be sure to radius the ports real well
 

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Discussion Starter · #8 · (Edited)
Is there a difference between using WD40 to hone instead of SAE 30? I was told any OIL would work. Thanks!


If you can snag you fingernail on it, bore it
I would use plenty of WD40 and hone it for a minute or even two
Then see what it looks like
Boreing jugs can be done at any local Auto Machine shop
Just be sure to radius the ports real well
 

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240 grit is what I normally use. If you've got no other options, hone it and send it!

That said, local machine shops around me would bore a pair of cylinders for ~$100, that might be worth the investment (especially if you have half that in the hone already) depending on if the bore has any taper or out of round too.

What was the cause for tear down?
 

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I use anywhere from 180 up to 320 depending on the condition of the cylinders. And yeah a local shop can do those as well for decent price. I would bore them just to be safe but we all understand how money issues can stop that with not much time left in the season in most places unless you live out west, the UP, Alaska, Canada or some parts of the east coast.
 
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