CYP77 - Police | Race Bikes | Choppers, Bobbers and Mods
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G-Man
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- Location: Derby, UK
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by G-Man » Wed Jul 02, 2014 3:11 am
AlanW wrote:Hi, I have just what you need, ART pistons +0.25 and barrels in new condition they are off my cb72. This is my 1st post on this forum and I am not sure of procedures or how to contact other members so bear with me. I live on the Wirral.
Alan
Welcome to the forum. Dave is after some 64mm liners and pistons for a big bore kit.
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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DaveM
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- Location: Wirral near Liverpool UK
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by DaveM » Wed Jul 02, 2014 6:05 am
Hi Alan welcome to the forum, i have sent you a P.M
Dave.
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AlanW
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by AlanW » Fri Jul 04, 2014 3:32 am
A belated thanks for the welcome guys.
Alan.
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teazer
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by teazer » Fri Jul 04, 2014 12:48 pm
That's an easy one - or used to be. Grab a used CB750 cylinder block, heat and let the liners drop out. They need to be shortened a little and that's about all there is to it.
I know guys who used to bore out stock CB77 liners to take 64mm pistons but that leaves them really thin.
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DaveM
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- Joined: Tue Dec 23, 2008 7:23 pm
- Location: Wirral near Liverpool UK
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by DaveM » Fri Jul 04, 2014 2:50 pm
Teazer cb750 are 61mm can they be bored out to take 64mm pistons ? which i suppose would leave them really thin also, i am not trying to run a 305cc . 64mm bores give 347cc .
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LOUD MOUSE
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by LOUD MOUSE » Fri Jul 04, 2014 3:19 pm
Good ta see ya again. ..............lm
teazer wrote:That's an easy one - or used to be. Grab a used CB750 cylinder block, heat and let the liners drop out. They need to be shortened a little and that's about all there is to it.
I know guys who used to bore out stock CB77 liners to take 64mm pistons but that leaves them really thin.
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G-Man
- honda305.com Member
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- Joined: Wed Mar 25, 2009 5:17 pm
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by G-Man » Fri Jul 04, 2014 3:57 pm
DaveM wrote:Teazer cb750 are 61mm can they be bored out to take 64mm pistons ? which i suppose would leave them really thin also, i am not trying to run a 305cc . 64mm bores give 347cc .
That was one of the most common parts to use and yes, they will be thin. I have a CB750F barrel but haven't dropped the liners out to measure them yet. They start off at 62mm with a shorter stroke (62 x 62) compared with the CB750k (61 x 63 ).
Teazer - welcome back!
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
