Re: 1970 cb 4-1 on a 1981 cb?
Posted by TOOLS1 on Sep 07, 2013; 3:17am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1970-cb-4-1-on-a-1981-cb-tp4045011p4045473.html
The stud spacing is the same on all the CB 750 engines. Both SOHC, and DOHC. I know, because (some of you will not believe this) I have both.
The early engines 69-75 had the spigots that bolted to the head, and then the exhaust pipe slipped over it. The 76-83 (both SOHC, and DOHC) just use a crush washer (also used between a spigot, and the head on earlier models) and a finned flange with half moon wedges. The exhausts can be switched by just removing, or installing spigots. Also the port locations are the same on all the engines. However you might have clearance problems under (on 4 into 1 systems) or at the rear where the exhaust mounts.
TOOLS
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1970-cb-4-1-on-a-1981-cb-tp4045011p4045473.html
The stud spacing is the same on all the CB 750 engines. Both SOHC, and DOHC. I know, because (some of you will not believe this) I have both.
The early engines 69-75 had the spigots that bolted to the head, and then the exhaust pipe slipped over it. The 76-83 (both SOHC, and DOHC) just use a crush washer (also used between a spigot, and the head on earlier models) and a finned flange with half moon wedges. The exhausts can be switched by just removing, or installing spigots. Also the port locations are the same on all the engines. However you might have clearance problems under (on 4 into 1 systems) or at the rear where the exhaust mounts.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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