Honing when fitting new rings?

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Looper
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Honing when fitting new rings?

Unread post by Looper » Sat Jun 13, 2015 11:03 pm

Hi, quick question for anyone in the know. I'm fitting new rings to a Honda C50 engine, the bore is fine but will it need to be honed to help the rings bed in?
Many thanks.

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Zunspec
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Re: Honing when fitting new rings?

Unread post by Zunspec » Sun Jun 14, 2015 12:16 am

Always helps to speed the bedding in of rings, although not necessarily essential.

Looper
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Re: Honing when fitting new rings?

Unread post by Looper » Sun Jun 14, 2015 2:39 am

Thanks for that. I stripped the engine as the compression was low and it was burning oil. Looks like the valves were to blame, but was thinking I'd put new rings on while I was at it. If I don't need to get it honed I'll do it to be on the safe side. Thanks again.

trophy
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Re: Honing when fitting new rings?

Unread post by trophy » Sun Jun 14, 2015 12:56 pm

scuff the bores with fine wet and dry to take of the glaze or the rings will take a long time to bed in.

Looper
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Re: Honing when fitting new rings?

Unread post by Looper » Sun Jun 14, 2015 2:20 pm

Thanks trophy. How fine a paper would you use? 400, 800, 1200? Not done it before and I'd be worried about over doing it. Cheers.

DAVE M2
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Re: Honing when fitting new rings?

Unread post by DAVE M2 » Mon Jun 15, 2015 11:39 am

at autojumbles, I have seen those three legged hones that you chuck in a drill.

are they any good?

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Zunspec
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Re: Honing when fitting new rings?

Unread post by Zunspec » Mon Jun 15, 2015 12:45 pm

DAVE M2 wrote:at autojumbles, I have seen those three legged hones that you chuck in a drill.

are they any good?
Better than hand applied Wet'an Dry Dave. Used one in a hand drill at the circuit to clean a bore after a seizure on the race engine. Better to use it in a pillar drill though.

Cheers Geoff

DAVE M2
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Re: Honing when fitting new rings?

Unread post by DAVE M2 » Tue Jun 16, 2015 1:40 pm

Thanks

I have a pillar drill ( bought on a whim and sadly underused due to clutter) so I might pick one up.
It will give me an excuse to use it.

I have a cub to rebuild and a second engine to acquire parts for so there may be use for it.

Pete R
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Re: Honing when fitting new rings?

Unread post by Pete R » Tue Jun 23, 2015 9:32 am

I can't say what hone grit they'd use on a HONDA, with possibly chrome-plated top ring.
If it were a Triumph with iron rings, you'd be using 150 or 180 grit stones.

You'd also assemble it with all excess oil wiped off the bore with a clean rag, and no oil used in ring lands or on rings. One drop of oil smeared on both front and rear piston skirt. This drier assembly works on Hondas, and can prevent a further smoky engine. Just ride and load the rings immediately and avoid idling at start up, to get the rings seated.

Looper
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Re: Honing when fitting new rings?

Unread post by Looper » Tue Jun 23, 2015 10:01 am

Thanks Pete.

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