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cylinder honing grit? #797216 02/01/20 4:04 pm
Joined: Aug 2001
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Curmudgeon Offline OP
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I'm renewing the top end on my 850 Commando and need to hone the cylinders. I believe it needs to be done with 220 grit honing tool, is that right?


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Re: cylinder honing grit? [Re: Curmudgeon] #797218 02/01/20 5:10 pm
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kommando Offline
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150 to 180 for cast iron rings.

Re: cylinder honing grit? [Re: Curmudgeon] #797240 02/01/20 8:06 pm
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htown Online Content
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Are you using Hastings cast iron rings? I've used them in 3 Commando rebuilds and had them seat on first start up. Here are their recommendations. Note 220-280 grit. I used 250.
https://www.hastingspistonrings.com/tech-tips-faqs/cylinder-bore-refinishing


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Re: cylinder honing grit? [Re: Curmudgeon] #797270 02/02/20 1:38 am
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JakeH Offline
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If the top rings are both black cast iron i use 150 stones. Some get away with 180. If the top ring is chrome, or has a shiny face, 220-280.
If bores are straight they will seat right away !!


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