Cl77 Crank shaft

thepunisher2007 · Post by **thepunisher2007** » Mon Feb 25, 2019 12:22 pm

In need of a usable crank shaft for a 65-68 CL77

I have managed to get 2 so far neither i can use. one has been modified and won’t accept the correct bearing and the other has a tap snapped off in the internal thread which is proving impossible to get out.

iv got my local engineering firm working on though but there taking a while ind i’m looking to get my project rolling again.

thanks
Mike

GORDON BROWN · Post by **GORDON BROWN** » Mon Feb 25, 2019 1:21 pm

Hello Mike

Cant remember if the CL cranks are all 180 degrees but if they are I may be able to help with a CB72 one you could use ( you would need to blank the starter clutch oil feed hole ).
You are probably aware, the only way you realy know if they are good is to have them appart and checked though.

If you cant get anything local give me a PM and I will see what I have.

thepunisher2007 · Post by **thepunisher2007** » Mon Feb 25, 2019 3:24 pm

i didn’t know you could get them apart. my parts list has them down as all one part number. i figured they perminatly at the factory.

as far as 180 degrees goes i believe anything other than that is considered to not be standard. i’m in norfolk what part of the country are you in

G-Man · Post by **G-Man** » Mon Feb 25, 2019 3:55 pm

The cranks can be dismantled & rebuilt after cleaning and replacing bearings, where necessary.

You could 'fix' the one with the stuck tap just by changing the outer piece.

As Gordon says, the CL77 Right hand end does not have the oil hole that the CB77 crank has.

This is one I rebuilt.

G

thepunisher2007 wrote:i didn’t know you could get them apart. my parts list has them down as all one part number. i figured they perminatly at the factory.

as far as 180 degrees goes i believe anything other than that is considered to not be standard. i’m in norfolk what part of the country are you in

thepunisher2007 · Post by **thepunisher2007** » Mon Feb 25, 2019 4:52 pm

would that require any special tooling to ensure they are lined up at the end or would they only go back together in the correct form. are the easy to get them apart. as i can get the bit i need to replace on ebay for about £30

G-Man · Post by **G-Man** » Mon Feb 25, 2019 5:05 pm

Mike

Yes, special tooling (and a good press) to dismantle & reassemble. Although just pulling off the outer web is a little easier. When you put it back together with a press you have to get the conrod side clearance right and the runout to within 1 thou.

I built this alignment jig to reassemble the centre section.

You don't really need special kit to check the final alignment but it helps....

G

thepunisher2007 wrote:would that require any special tooling to ensure they are lined up at the end or would they only go back together in the correct form. are the easy to get them apart. as i can get the bit i need to replace on ebay for about £30

AlanW · Post by **AlanW** » Tue Feb 26, 2019 3:36 am

Hi Mike,
I may have a good 360 crank if that's the one you need.
Al.

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