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fletchman919

320 grit or 240 grit hone?

17 posts in this topic

Which would be better: A 320 grit flexhone or a 240 grit flexhone? I'm wanting to buy the 320 grit because I think it would do the job without removing any more of the plating than is necessary. But I have no experience in honing a plated cylinder and would like for someone to inform me. Also what diameter works best: 3 1/4" or 3 1/2"?

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My trusty Eric Gorr books say use the 240 grit. You only hone cylinder for about 8 seconds wet with some oil. Don`t worry you will not damage the liner as it is extremly durable.:mad:

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I used the 3 1/2 and it was a tight fit, you could easily use the 3 1/4. Go with the 240 grit.

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I read that 240 grit is designed for cast rings and 320 is for molly rings. At least that is what Flex-Hone recommends.

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I read that 240 grit is designed for cast rings and 320 is for molly rings. At least that is what Flex-Hone recommends.

Which rings does the CRF have or do I have a choice? If so, which is better?

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Which would be better: A 320 grit flexhone or a 240 grit flexhone? I'm wanting to buy the 320 grit because I think it would do the job without removing any more of the plating than is necessary. But I have no experience in honing a plated cylinder and would like for someone to inform me. Also what diameter works best: 3 1/4" or 3 1/2"?

read about plateau honing, real interesting.:mad:

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read about plateau honing, real interesting.:mad:

If I understood what I read, then platea honing is when you would hone in layers. For example, hone a cylinder with a 180 grit. Next hone over that with a 240 grit. Then use a 320 grit. If this is the proper definition, then I don't see where it would be practical. :mad: Because you rough the cylinder up, and then work to smoothen it back up. Maybe I misunderstand or maybe it just isn't sinking into my brain. Can someone clarify this type of honing process? I did a search, but nothing real informative came up.

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A 3.00" flexhone @ 320 grit is the proper version to deglaze a stock sized bore for new rings.

Agree. I used one I bought oiff ebay and it worked great - quickly!

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Oh man, don't tell me that! I just bought a 3 1/4" 240 grit hone off ebay! I wanted to get the 320 grit, but I read more posts of people using 240 grit and decided to buy that one. Does it really matter a whole lot? I figured everyone that was using the 240 grit thought it would seat the rings better.

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Not sure I understand the question. I assume you have a stock 250? If so, you have these:

Rings: #2 in picture

BTW, where in Ohio are you? Im in Cincy

Dudeman67 said that the 240 grit was for the cast rings and the 320 grit was for the molly rings. I wanted to know what kind of rings were stock in a CRF250....I'm in Wilmington, about 50 mins northeast of Cincy.

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Oh man, don't tell me that! I just bought a 3 1/4" 240 grit hone off ebay! I wanted to get the 320 grit, but I read more posts of people using 240 grit and decided to buy that one. Does it really matter a whole lot? I figured everyone that was using the 240 grit thought it would seat the rings better.

Don't worry the hone that you purchased will work just fine. I used the same flex hone for my rebuild and it worked well.

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Don't worry the hone that you purchased will work just fine. I used the same flex hone for my rebuild and it worked well.

Cool! Thanks!.... Anyone know about the rings? I'm just curious now. My repair manuel doesn't mention what they are made of. At least I couldn't find it if it does.

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