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Oversize head gasket

CYP77 - Police | Race Bikes | Choppers, Bobbers and Mods
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CharlesM
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Joined: Sat May 23, 2015 4:45 pm
Location: London, UK

Oversize head gasket

Post by CharlesM » Tue Mar 14, 2017 6:13 pm

I race a CB72 bored to 64mm. I am finishing the refresh and need to replace the head gasket. Last year I used a CB77 standard gasket, which was ok, but the edge of the piston just clips it Boretech in the states do a 66mm gasket, but that's about 150$ to get it to England.

Having gaskets made will be about £100 to set up the tooling as a minimum.

Any ideas on suitable alternatives? So far, my plan is to use a CB77 gasket again.

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G-Man
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Post by G-Man » Wed Mar 15, 2017 3:05 am

Hi Charles

Have you talked to anyone about laser-cutting you a copper one? Apart from getting a drawing done and the cost of the copper it shouldn't be too expensive.

http://www.barnwell.co.uk/products/gask ... materials/

These guys could probably adjust the bore size of this part...

http://www.ebay.co.uk/itm/HONDA-SUPERHA ... 25b5cdfbb8

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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malcolmgb
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Joined: Mon Nov 07, 2011 11:52 am
Location: Midlands UK & Cleveland OH

Post by malcolmgb » Thu Mar 16, 2017 5:26 pm

1977 CB400F
1973 CL175
1976 XL175 - Sold
1964 CL72
1966 CA78

lloydy1
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Location: North Wales

Post by lloydy1 » Fri Mar 17, 2017 3:20 am

Hi Charles

I made one up myself....made a template up and cut it out of a copper sheet.

Dave
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