Hi, I am new here with a Question, I have this really nice 78 CB750k without Carbs, then i bought a set of Carbs but i can't figure out where all the Vacuum Hoses attach to.Does anybody have some sort of Diabram for these Carb set ups ? Thanks
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Vacuum Hoses ?
- Thread starter old-drone
- Start date
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- Tags
- carburetors sohc
Where exactly are the vacuum hoses you are talking about?. There really isn't much for vaccum hoses, unless you are seeing the vent tubes?
OK...did the bike have the solenoid valve or did it come with the carbs? Did you by chance get a carb set from the automatic 750? Any way you could take a picture of your setup? I dont want to guess at what you have and then be totally wrong as to how you need to hook it up.
Hi again, Sorry but i dont have a Digital Camera to take a Picture. I will try and see if i can borrow a Camera, and Yes the Valve and Air Filter Box came with the Carbs. The Person i got these from is moved Oversees and i cant get anybody locally to help me.
cyclebuster
CB750 Addict
I just read they may have smaller intake size, so see if they fit your boots first, before investing in them. I am not sure if that big diapragm thing isnt just an anti stall dashpot assy. I havent seen a set in years honestly. BUT the do sell big on ebay, so you could clean them up, toss in a kit and score the extra cash to get a nice correct set.
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Yes the diaphragm is an anti stall dash-pot. I would get a different set of not automatic carbs as everyone else said. Looking on ebay you should be able to get enough out of your carbs to buy a decent set of correct carbs. Not worth the hassle to make these work on your application.
You will loose some power with these carbs they are smaller. The anti stall isn't needed on a standard 750, the automatic 750 needed it to keep the idle up when it was put into gear. I would think it would cause more of a problem on the standard 750, you wouldn't really want the idle to kick up while you are in gear slowing down or coming to a stop. You could run the carbs and just take the anti stall off but again you are still stuck with the detuned carbs.
So you have a Hondamatic?
No problem. You dont run across the automatics very often so most people dont have questions about them. There should be an electric solenoid. Bottom hose goes to the airbox. Top line is vacuum from the carb but there needs to be a checkvalve in the line. Side vacuum line goes to the dashpot.
See if this picture makes any sense for what you have.
See if this picture makes any sense for what you have.Bohnzye
CB750 Enthusiast
I'm voting for DirtDigger for...? You rock Buddy....
No problem. Hope you get it running.
Hi Dirtdigger and every body else for the help, I just hooked up the hoses like You said and put in some Fuel and pulled the Choke and she Fired right up and runs reasonably well, She wants to stall when i open the Trottle but when warmed up she runs OK, Thanks for the Help.Now i need to get a Synchronizer for the Carbs and i should be rolling in the Spring. lots of Time to Polich her up and lower her a little so i can reach the Ground, maybe some shorter Shocks and do something with the Front end.. Thanks again
cyclebuster
CB750 Addict
is the air box on? the bog should go away with the entire air box installed.
