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CB77 Connecting Rods

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briggsman
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Posts: 7
Joined: Sun Sep 09, 2012 2:51 pm
Location: Cloverport, Kentucky

CB77 Connecting Rods

Post by briggsman » Tue Sep 11, 2012 4:18 pm

I had to cut the cylinder jug in half to get the crank to turn (2 months of soaking the cylinders did not work) I cut a slit in the side of the sleeve and still had to hammer the pistons out. Anyway, I thought about cutting the rods first, and started on one of them (why did I do that!?!) So I need a rod. I saw one on ebay with the crank. It's off a 1964 hm481, does anyone know if the rods will work on a my '66? Also, the dynamo on the crank for my '66 CB77 says CB72, are these engines similar?

conbs
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Joined: Mon Mar 16, 2009 3:29 pm
Location: SW Idaho

Replacing a rod

Post by conbs » Wed Sep 12, 2012 8:59 am

Replacing a rod is a pretty major operation. There are no splines where the counterweights fit to the round shaft for the big end. The counterweights must be perfectly lined up when the crank is pressed back together.

Before you try it, you may want to talk to someone who has done it to get a good idea of what it will take to get everything lined up again.

Your parts manual will tell you what rod you need.

jensey
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Joined: Sun Jun 17, 2012 3:34 am
Location: Netherlands

Post by jensey » Wed Sep 12, 2012 9:42 am

Hi,

A little late, but you didn't try heat ?
I would look for a used crank,

Jensen

briggsman
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Posts: 7
Joined: Sun Sep 09, 2012 2:51 pm
Location: Cloverport, Kentucky

CB77 rods

Post by briggsman » Wed Sep 12, 2012 7:12 pm

Tried heat, didn't work. I scored an alignment mark on the end of the crank weight and rod lobe and pressed it off.
Is there a website that may have the crank/engine id info?

Tim Miller
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Joined: Mon Jan 30, 2012 6:22 pm
Location: Pflugerville, TX

Re: CB77 rods

Post by Tim Miller » Wed Sep 12, 2012 7:54 pm

I can rebuild or reassemble your crank. But it's not cheap.

Tim
briggsman wrote:Tried heat, didn't work. I scored an alignment mark on the end of the crank weight and rod lobe and pressed it off.
Is there a website that may have the crank/engine id info?

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