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Vintage Honda Owners,
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My Stuck Pistons SOLVED
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Post new topic   Reply to topic    Honda305.com Forum -> Honda Dream - CA72 | CA77 | CA78
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G-Man
honda305.com Member


Joined: 25 Mar 2009
Posts: 5533
Location: Derby, UK

PostPosted: Thu Dec 06, 2018 10:09 am    Post subject: Reply with quote

Unfortunately the pistons I thought were CA77 are CB77.

All is not lost, though - I have found one CA77 STD piston.

Will keep looking.

G

Dr. Frankenstein wrote:
Yup - my cylinders measure 59.85 all the way down, give or take one or two hundredths.

_________________
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F
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Dr. Frankenstein
honda305.com Member


Joined: 02 Feb 2010
Posts: 506
Location: Charlottesville, VA

PostPosted: Thu Dec 06, 2018 10:52 am    Post subject: Reply with quote

I Think Standard-size CB77 pistons ARE 60mm...aren't they ?
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G-Man
honda305.com Member


Joined: 25 Mar 2009
Posts: 5533
Location: Derby, UK

PostPosted: Thu Dec 06, 2018 10:58 am    Post subject: Reply with quote

They are indeed but the crown design is different from CA77 and might lead to a lower compression ratio.

That said, I do have some high compression ones.....

Let me rummage a bit more.

G

Dr. Frankenstein wrote:
I Think Standard-size CB77 pistons ARE 60mm...aren't they ?

_________________
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F
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View user's profile Send private message Visit poster's website
G-Man
honda305.com Member


Joined: 25 Mar 2009
Posts: 5533
Location: Derby, UK

PostPosted: Fri Dec 21, 2018 11:52 am    Post subject: Reply with quote

Still unable to find a pair of 60mm CA77 pistons.

Dr. F

This is what I have. CB77 pistons in LC and HC. One CA77 Piston in the middle.

Cb77 pistons need to be tested with CA77 head but, if they clear, they should be OK.






Not perfect, but what is these days? :-)

G

_________________
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F
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View user's profile Send private message Visit poster's website
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