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I had been using my cb750 perfectly fine but, last week I was going to go for a ride and when ever i switch gears from N to L (low) or D (drive), the bike turns off. any suggestions to what it could be?
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Is your kickstand down when you put it in gear? Not sure what year your bike is or if it has a safety switch on the kickstand but if it does check to make sure its up when you put the bike in gear.
I know enough to get me in trouble.
1981 Yamaha XS650 Special(current cafe, code name El Diablo Rojo)
1981 CM400C, completed project (code name Home Wrecker)
1981 CB750K, completed project (code name Winter Blues)
SOLD 9-21-2013 gone but certainly not forgotten.
2009 USA Choppers Bad Boy, rigid frame custom chopper.
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Administrator
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Is it stalling out, or just shut off like the ignition switch was turned 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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yes, I am making sure the kickstand is up, when its is down it wont even let me do the switch since it is locked, bt this problems is after the gear switches the bike give me a little kick and then dies.
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it seems like it wants to stay on for a sec. and then it dies.
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Administrator
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If it is trying to go then dies, it makes me think that you have a carburetor problem, and not an electrical problem.
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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But when on neutral it seems perfectly fine and I also noticed that one of my fuses burnt out.
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Administrator
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Does it die after putting a load on the engine, such as putting it into gear? If, so you have a carburetor problem.
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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What is the history of this bike? Is the electrical system in good shape - properly wired up - as far as you know?
Wondering about that blown fuse - have you replaced it? Which fuse?
Your problem doesn't sound plausible - based on your description. Your description makes it sound like - put bike in gear, and engine dies instantly - like you hit the off switch. Does the engine die that abruptly - or does it slowly die?
If you "blip the throttle" can you keep the bike running in gear? Thinking about the idle solenoid here . . . .
The most detailed description you can provide helps us all help you.
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Re-read your other posts.
I see that the bike dies within a second or so. Back to the idle solenoid.
If you look closely, you should be able to see the dashpot pull open the throttle slightly when the bike is in gear (to keep it running), and then drop back slightly when the bike is shifted to neutral (so the engine doesn't rev too high).
Back to my prior question - can you either "blip the throttle" or hold it open slightly to keep the bike running?
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It has no clutch it is an automatic with only a low and high gear
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It does die when switching gear it is good while neutral (idling seems fine) as soon as i switch it to low or Drive gear it dies within 2 sec
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So - can you keep it running if you hold the throttle open slightly? Put your bike in gear, and give it a little gas - just enough to get back to the normal "idle speed". If the bike still runs when you open the throttle slightly in gear, then I'd bet good money that this in your problem.
BTW - yes your bike has clutches - they are there - but you don't control them directly. When you switch into gear, a clutch is engaged.
The 750A bike differ from the 400/450A bikes in this way. The later 400/450A bikes have no clutches at all. Different methods used. I wish that the 750A bikes were designed like the 400/450A bikes for this reason . . . a lot less complicated.
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I also have a 77 cb 750 A need of sprocket and chain anybody know best setup for this bike? thanks
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Administrator
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18/48 with a 530 O-ring chain.
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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Locked
