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Hey, all. I recently took on a very cool project but have a question. A friend acquired a hill-climb trike. Its a cb750 motor and partial frame, with a four-wheeler rear half. The thing is about nine feet long and very neat. But the number 2 carb overflowed and the bike caught on fire destroying all the wiring in the middle of the harness. I have just about finished rewiring the bike but there are a few wires dangling with no homes. i got online to find a wiring schematic but here's my issue. The engine is stamped cb750E. The last numbers of the vin are 76 so I assume this is the year since none of the other numbers would make any sense at all. I did some poking around but can't find models other than the K, F and A. Anyone have any knowledge of this? And, if so, would the wiring be the same throughout the different models? The ONLY thing I could find online was a page with pics of E-stamped motors with bikes that were called "The French Connection". Maybe built for sale in France? I have no idea. I also found that the E engines were sand-cast, but that could be the same for all the models. Any ideas?
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Have an "E" on my 77 F2 
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
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E = Engine.
Why don't you go buy a workshop manual, it has all of the wiring diagrams in it.
Also if you type in the words CB750 wiring diagram into Google you will have many choices.
Just click on IMAGES. Not web results ....IMAGES
Too bad you could not show us a photo of your machine.
Better clean the carbs or those floats could stick again.
It may need 4 new float needles if cleaning them does not work.
On a Roadstar Adventure.
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Administrator
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Most every CB 750 engine has an "E" in the serial number. Only the "A's, and some "F's" have a different letter in the serial number. I would rewire it with this simplified wiring diagram.
 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)
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I have a manual. And three google images schematics already. I was just trying to figure out the E designatation. And whether or not there was any significance for that motor. There is no K, A, or F in the serial number or I would've disregarded the E altogether. I will take a few pics the next time I am over there.
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Oh and I am also rebuilding carbs and replacing the needles and seats anyway.
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The only engines that were sandcast, were the early 1969 models, as far as I know -- they're collector pieces because so few were made! I hope that is not a genuine sandcast engine...  Did you check the plate on the steering head? It will have the model, and year, stamped in it. That's assuming the engine goes with the frame you still have the engine attached to.
Honda tried to standardize their wiring by using color-coded insulation: black, black-white, black-yellow, red, red-green, etc. If you have some of the original wires that are looking for a home, try tracking them down by their color coding compared to the schematic's color listings. Barring that, you could apply the process of elimination/verification... Tedious, but thorough. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
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Ya if that is a sandcast you could make a lot of money parting it out or selling it complete. That said it sounds like its unlikely because you also said it was a 76.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.
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I am guessing it is a 76. Only because the last numbers in the vin are 76. I need to get my hands on that vin and get some more info.
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Ok here is the complete vin: cb750E-2524176. I'm having trouble finding anywhere online that can decode this. I read a post from TOOLS stating he had all the Honda vins memorized lol. So, tools?
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Administrator
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That site SUCKS!!!!  TOO many know it all's. If you do not believe me just go there, and post a welding question.
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)
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TOOLS1 wrote
That site SUCKS!!!! TOO many know it all's. If you do not believe me just go there, and post a welding question.
TOOLS
Did you "Flunk Anger Mang."or drop out,
They kicked me out of A.A.(12 step program)Guess over educated.
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
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Administrator
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I flunked. The class just kept pi@##$%^ me off.  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)
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Administrator
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Hondachopper is an alright site. Most of the guys are laid back,only a few fussy ones. Of course,this site is best!
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Locked
O ya bike year. LOL