carburetors

Before anyone says a thing...Yes I used the "SEARCH" function. Any way. Earlier this year I bought a 1982 CB750C. The previous owner had rebuilt the engine and replaced the stock cams with CB900 cams. He had also added MAC 4 to 2 pipes which have zero baffles in the megaphones meaning basically...

So I have rebuilt the carbs and ended up having to replace the fuel rail gaskets/o rings. I put it all back together today. When I started it it was idling around 4000 rpm. (I started it before I replaced the rail o rings and idled around 1000-1500. Not sure what the actual number was, I didn't...

Hi guys. I'm starting a carb improvement project; my '81 has never started very well and I'm tired of hanging onto the throttle for 10 minutes every time I start it up. The bike is now going have to be a daily commmuter -rain and shine- it's got to be more user friendly. After checking valve...

Howdy - I just yesterday acquired a '79 cb750 limited. I can't figure out how to remove (or lift) the seat to get at the gas tank so I can remove it? I looked through the shop manual, but couldn't find the info in there. I'm thinking I should buy a Clymer manual which should have the info...

I have a 81 750 custom my brother gave to me. It died on him a few years back and he bought Harley.....first I thought it was going to be electrical, but I rebuilt the carbs and put new float needles in also. I got the bike to fire up and run YIIPPPEEE!!. But I have fuel pouring out the carbs. I...

So I got my CB750 with the release for the gas cap broken and the cap shut to where I can't open it. Any ideas on how to open it again? Also, this claims to be able to replace the latch, should it work...

Hi all...NEW member here....today I brought home, bought from the original owner a 1978 750K. Cosmetically the bike is almost like new. BUT right now it is running like CRAP. The only way it starts and runs is with the choke full on. Even when warmed up, if I take off the choke it dies. One...

81 CB750 Custom, just bought yesterday. Turn on Petcock and fuel just pours out the first carb (drivers side). :mad: Turn off the Petcock and it stops...I'm in serious trouble here boys, the wife paid for this bike on my recommendation and I have to get it running asap. I'm not the most...

Hey all. been fighting with this bike for a while now and finally broke. ive come to this forum with one major question. how in the hell do you make pod filters work??? ive done a lot of research into them, and we can all agree the stock airbox is bad, and people have made them work before. ive...

Hello all, bought my first motorcycle last week (1978 Honda CB550k) non running. After some work with the carbs, points and plugs, its finally running. However, there is something im very concerned about. When i was first cranking over the bike after reinstalling the carbs, i let the bike crank...

Ok so I have a 1977 cb750k, slow project I have been working on finally got all the wiring sorted out and got the bike running. I know that I have some jetting to do but I'm not sure what exactly jet the carbs too. I'm running a Vance Hines 4into1 open header and individual pod filters. I know...

Hi guys, So, I'm in the middle of cleaning and rebuilding the carbs after finishing a complete valve job. When I bought the bike, it had pods but the PO had the airbox. I'm planning on using the airbox when I install the carbs. I've been gathering all the part necessary to make it work, but I...

Hi guys I'm new to the forum and just getting my head around it so I apologise if this is already covered. I bought a 76 CB750 k a few months ago. I was so excited that I changed the oil out, clean up all of the electrical connections. New pugs, bulbs and cables and fired her up. She ran first...

Hello, I have a problem with my Honda CB750 bol D'or 1981', It seems that it is running to rich, when hardly accelerating it looks that not all fuel is being burned and that confirms spark plugs, 3 are completely black and one is OK. Carbs were just rebuilt, cleaned in ultrasonic bath, all...

Hi all, I have a '72. Ran fairly well until the other day. When the engine is cold, at start up idle, you need to keep your hand on the throttle or it will die, ...when engine is warmed up it idles a bit high...when the engine is cold, it runs awesome, no issues, but now after riding about 20...

Hi again all, I was able to get my carbs. all reassembled and installed. Checked my point gaps and cleaned and checked gaps on plugs. Emptied and cleaned out gas tank and put in new gas. I haven't installed to airbox yet just tried to get it running. Charged up battery and it roared to life...

Hi everyone, Just picked up a 1979 cb750 10th Anniversary, in great condition, no leaks, no modifications and about 46,000 miles on it. My question is that it still uses its original airbox. How tricky is it to swap it out for air pods? Does it require replacing the carbs as well? Thanks...

Hi all, I have a 1978 CB750 super sport it is not an automatic. I'm cleaning the carbs. and trying to set them up. I noticed when I took the carbs off that I have one fuel line coming to the carb. There is smaller port toward the intake, this was not hooked up to anything. Is this a fuel line...

Hey guys New guy here. I recently bought a 1981 CB750K. 100% stock except for a goofy sissy bar that needs to come off. This is my first 4 cylinder bike. It's in very good condition with 18k miles. On the ride home, I noticed it wouldn't spin past 5500rpm, so I threw some new plugs in it...

I'm rebuilding my carbs on a '74 cb750K and the throttle slide only sits halfway down the body (shown in pictures). It seems to me that the actual needle is too big for the jet, because there are no hangups in the body that I can see that are preventing the slide from moving down. I've been...

First post here, I recently purchased a 76 cb750K and i'm having issues getting the float valve needles to seat, which is resulting in overflow on one or more of the carbs. The valve needles are different than the stock ones in the manual, with a black rubber tip and a clips that hold them to...

Simple question that my manual either doesn't answer or I just don't know how to find the answer. How tight do I screw in the needle jet holder?

Hello guys, I just got a 1978 CB750K left to dust since at least 20 years. I did a light but complete tune up and I was able to had it running (with full choke on of course). New spark plugs, new air cleaner, new gas, carbs cleaning plus new floats gaskets and needles. Put everything back in...

I'm new to this forum, but I would like to begin by saying thank you for your help. I'm appreciate what you have done for me already, and I hope I can give back some time. The vacuum diagram from Dirtdigger has saved me a lot of head scratchin'. My questions have been answered on previous...

Hi all, I have owned my 1979 Honda CB750 since it had zero miles on it. It is in mint condition and gets used every week (except for in the winter). It took 37 years for me to have a problem with it. When the bike is cold it starts and idles fine, but when the engine warms up (after a few...

Hi Everyone, I recently purchased a 1981 CB750C from a guy who had intended to restore it. It was still in good overall condition and was running when I bought it, but it was obvious that there were some carb issues. It had some fuel leaking from at least one carb. Since the bike was still...

So long story short, I'm currently attempting to start my bike up after having it sit all winter and I'm having some problems. Over the winter I rebuilt the carbs, and I just recently put in new iridium plugs. I Re installed the carbs following this picture (forgot to take pictures of fuel line...

Hey all, maybe someone had this problem before. My CB750 is running OK, but the exhaust smell is unbearable, people closing windows when I stand next to them at lights :). Makes me think it doesn't burn all the fuel, or very rich. No smoke. The bike has Dynojet stage 1 with a free flowing 4...

I bought an old penske dwell/tach meter to accurately measure my rpms and adjust my pilot screws. Can I use the tach function on a bike without points? Where do I hookup the clamps?

I have a 1973 cb750 with pods an straight pipes pops backfires runs good at high rpm not good a idel an hesitates at low rpm any answers would be help full