How To Install CB750 Nighthawk Carburetors

Installing any IN-LINE four carburetor set up back into a bike can be a real task. ESPECIALLY on Honda's CB750 Nighthawks. In the video I will be taking you step by step on what I do to get these carburetors installed with the smallest amount of effort possible. ENJOY!
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[@joujimiichi1]

I have spent hours trying to reinstall carbs in a V-twin.... I can’t even imagine an in-line 4. When they finally slipped in I audibly said “boom” at the same time you did. Lols It’s a magical moment even if you’re just watching someone else doing it.

[@TheMotorcycleMD]

Hahaha it’s a sweet sound lol

[@calvinhamm3748]

I thought I was the only one who thought these were a bugger to install. Very clear Video Cody! Love the spray and grease technique. 👍❤️🇨🇦

[@TheMotorcycleMD]

Glad you dig it Calvin! Cheers! 🤙🏻

[@GrievenceCapitolist]

Had to give up on fixing my 78 cb750f ss . I found a local guy that actually wanted to help me keep the old bike get back on the road . New head work and rebuilding the carbs too . Took it to the shop Friday . When I showed up Saturday to agree and sign the work order the motor was already out of the bike . He said he had a great time working on something other than old Harley . If it wasn't you this guy is a close second . Thanks for all the great tips you share here on your channel . Cheers 🍺 Cody .

[@TheMotorcycleMD]

You can’t put a price on someone who is “in-to” doing the repair. Especially if they are good and thorough!

[@GrievenceCapitolist]

@@TheMotorcycleMD Thanks for the reply Cody . You have the fix it gene and the teacher gene . What a great and rare combination ! I'm just too busy working to learn your trade at the same time . That's on me not you . All the info and tech you provide is excellent . Road trips are in my near future . Swinging by your shop in in my plans . I want to shake your hand and thank you in person . If all goes well at Harberson cycle and repair I'll be riding next week . much respect man . You earned it !

[@ClassicRider]

I assume you found the rubber debris near intake #4? - Excellent Vid - I like the center stand awareness. I rebuilt my 79 CB750's, and plan now to rebuild my wife's 81's. I have no lift, and for the 81 no airbox. I ordered the colors and clamps and rebuild kits. And then figured to rewatch your vid - thanks - different carbs, different bike, but very much the same thing - When re-installing on my 79, Throttle cables and Choke cables were also attached first, and then the same slide time in and roll then down and in. Thanks for the reminder of the silicon lube - wd40 should do fine. I do not recall doing that last time, but having no lift, I recall having the bike between my legs while negotiating the carbs into their original collars on the 79 . For the 81, I figure it should be easier using new collars. I also don't think I will go for breaking them apart if the shafts are okay. Right now mostly float sticking from rusty gas. So I figure to get the internals working and then degunk the external for a visual, and if okay then reinstall. I will review your other vids - thanks again -

[@LuisDiaz-kg1fy]

Just did mine today. 1991 Honda cb750 nighthawk. I used 2 clamps one on each side of the carbs. Went in like butter.

[@shanec4441]

Another important thing to check is the alignment of the intake boots. You can put a straight edge on the front then the top of boots to ensure they are perfectly aligned. Great video

[@massoudzadeh3394]

Trophy to you for explaining this sensitive subject so well, Specially showing how to make sure the bike should not move forward, Thanks so much Cody, I wish you were in California

[@Motociclista760]

90° pick = machinist scribe, harbor freight, welding supply, or online. A must have in most tool boxes.

[@TheMotorcycleMD]

Agreed!

[@vermhot]

That’s another amazing video !! I have a 750 4 that I’m working on and this was very helpful for me !

[@provenpower2997]

Great video. One thing if you notice the little dot on the diaphragm cover screw that denotes they are not Phillips but are instead JIS (Japanese industrial standard). You may want to invest in a set of JIS screwdrivers. Hard to find in the states. I had to get mine from Japan. I have never rounded out one of these screws since buying those screwdrivers. Love your material. Keep it coming.

[@balmeros272]

Been waiting for the install, helps me a lot. Now I just need to get to work on my NH750. Intersted in the instruction at 40 bucks. I also have a CBk7 which also needs carbs installed ! Thanks M8 I'll look on the site.

[@GrievenceCapitolist]

Cody is rebuilding my carbs this week . That's why I'm back . Totally stoked !

[@jojonels]

Cody mate, i've spent so long and so much money on the carburetor, installing it and taking it off cos it was done wrong, after watching your video, i installed it with super little effort, thanks for the tip sir, keep up the good work. fan from Taiwan Nels

[@christhomas7178]

Perfect, no impact drill required could strip out screws do by hand if possible. Love the video thank you brother

[@whiteboyskittytv5840]

very cool. I have my late dad's 83 750 Nighthawk. Carbs must be cleaned. I'm going to do the install and re-install myself. Look for somebody to do the actual cleaning. These vids getting me through this. Thanks.

[@michaelwilliams4974]

Best video ever thank you

[@sthildas4857]

Thx Cody my 500lb+ Honda fell off my mover, onto my knees, staying safe. 🇬🇧🏍️

[@kiptonyost4388]

Used to use hockey stick to take carbs off/on. They work great w/o damaging things.

[@thelazyhandyman8581]

Great work

[@willmoua1]

I've noticed in previous videos that your nighthawk has pods. Can u show a video on how you went about jetting and adjusting mixture screws, jet choice, etc?

[@stevenwarner7348]

Ok Ok Ok ~. Where do I send a check? The least I can do is say Thank You for this! ~. 〰✨👍✨〰

[@lazer51]

I have an 80 CB 750 f. I have become quite good at installing and removing the carbs. have tore them apart cleaned them several times. runs for about 30 seconds and quits. Have compression, spark, spark under load also. Plugs foul except no 4 stays clean. I'm about ready to give up. Had this bike for 3 years and still haven't made it around the block. Thanx for all your great videos .

[@nighthawk3897]

Hi Cody. What would you say to a guy who was able to figure out how to do this on his own, without your video? My blue '93 runs like a dream. I'm afraid I'm getting too fat for it though LOL. P.S. The quality of your work is the best in the business.

[@njpaddler]

My method is: I wrap a bath towel over those old petrified rubber boots, then pour steaming hot water onto the towel & cover it in bubble wrap for about 20 minutes. Rubber is temporarily restored to it's youthful flexibility and the rack pops on without reluctance. As it cools, of course it hardens again, so you have to be determined and methodical, not wasting any minutes. It has never failed me, though.

[@TheMotorcycleMD]

Clever!!

[@timwaldram5619]

Nice clear video. I’m still fine tuning F2n (basically our Nighthawk in UK) carbs with pod filters. Bigger mains and pilots. All working well now except needs a few more revs than a standard bike on pulling away from rest. I think it just needs a little bit of fuel screws adjustment. Have you found any tools or methods for adjusting these without taking the carbs off because it takes half a day of carb removal and refit every time I want to vary and test mix screw positions?

[@TheMotorcycleMD]

Maaaaan, mixture screw adjustments are just a pain on these. Your going to burn yours hands regardless. Haven’t found a silver bullet tool yet to fit #2 and 3

[@phillheth]

Good vid dude. I'm getting towards the end of my first ever build. It's a cb400 sf nc31. The stock airbox is long gone. I hear getting the carbs right with pod filters could be a huge problem. Any suggestions? Thanks bud

[@sampitrone]

Great 👍

[@BrandonLund]

Fellow KZbinr can you help me out. I have a 2002 XR100r carb. There are 2 brass tubes that protrude into the carburator intake opening. The one at the bottom of the intake opening i can't blow through. The one next to it I can. Should I be able to blow compressed air through both of these tubes?

[@alexvalencia7441]

Heyyy I love ur page man I had a question tho if u can help it would be super appreciated .. I have a 93 Honda cb750 nighthawk and the other day my friend was revving the engine and I blew the clutch so I replaced them but the bike doesn’t wanna accelerate and I have no idea what else it could be

[@eduardoperez7797]

Have the same bike as your starting a project with my son going the scramble route on it taking advantage of your knowledge in honda bikes whats the larges knobby tire you have seen installed in front with original fork? We are not removing forks thanks in advance

[@jimharley7540]

Great video! I have a question. Can you leave the cables connected until you pull the 4 carbs out from the bike?

[@MrKneeah]

If they can go in with being attached, they can come out being attached. 😊 15:05 imagine you are ready to take them out here. 👍

[@pushinold]

Check out the T-shirts. They are very soft and comfortable. I use them everyday in my backyard shop. They seem to be holding up very well, Top quality manufacturing. Going to be hiding MotorcycleMD stickers on each motorcycle that I restore. I am working on the 7th for the year! 1982 GL500 Interstate with the fairing, bags and small trunk. Runs great.

[@TheMotorcycleMD]

My man!! That’s awesome

[@cylekeltner1261]

Synchronizing necessary or just try to put the idle mixture screws back the way you found them?

[@jamiegreen8065]

Hey I got a problem on my 1980 cb750 carbs. While trying to tune it I turned one of the fuel mixture screws in to far and broke the tip off inside the carbs. I didn't realize it at the time but I couldn't get it to idle properly so I recently decided to just pull them completely out to see what was wrong. When I started taking everything out and unscrewing jets I realized that the number 1 carb mixture screw tip had broken off. I've tried everything. Heat gun, penetrating oil, freeze off, and I have not been able to poke it through Frome the inside of the carb throat. I refuse to try drilling from the bottom because the screw hole is so deep that you can't see the drill bit. My next option is to bring it up to my job to see if I e if our millwrights have a way if getting it out without destroying the carb. From reading online forums, this seems to be a very common problem, so I think myself as well as many others will be very appreciative of any advice/expertise that you can give. Thank you

[@theislerider9513]

Hi, use Silicon-Spray to put the carburators back in place. Just there, where it is needed. I was able to bring the carburators into the position within in under 90 seconds.... and I am not a professional..

[@Dylansgarage24]

I have spend probably an hr trying to install mine in a 82 nighthawk 750 and have no luck so far used grease oil heat and a bar and no luck at all. Any other tips?

[@madelineblanchard9497]

Do you have any advice on reinstalling the airbox to carb boots? I foolishly removed them and now I'm snuggling to reinstall them.

[@jamiev8474]

Very similar issue with a suzuki bandit carbs installation

[@OTCinsane]

Would this video pertain to a 1992 cb750 Nighthawk?

[@insertname2704]

Hey I just cleaned my carbs and I reinstalled it but now my one throttle cable (the one closest to engine side) is just magically shorter and I can’t get it on the holder mount thing that attached to the carb cap, any help?

[@talgate5033]

What year is ur nighthawk I got a 92 cb750 nighthawk

[@JamesMBaima]

Is there a gas tank liner that really works No bullshit , just pulled carbs for cleaning 2nd time now on zrx put some time in getting rust out ,lining , cleaning carbs Wouldn't mind if product I used worked And It wasn't the applicator

[@ZeptronGaming]

I have a question you might know where to look. I have a cb750 92, cleaned carbs bit when it try to goes it feel low on power along with it'll start to go but after 20ish mph it doesn't really want to go but still does but feel low on power. We replace clutch because it felt like clutch since it low speed but high ram. We have taken off carbs multiple times and tuned and engine of compression but it still lack power. Any suggestions got tired of throwing money at it and every mechanic nothing given me a straight answer just an estimate saying min of 700$ to fix a problem we don't even know.

[@justonovak8216]

I will suggest get the master course from Cody on carburetors, at least after that, you know for sure it is not the carbs, and only cost like 40 $. After that you can probably check something else.

[@njpaddler]

Send detailed description of the symptoms to the Askbrokenmoto.com show email [ [e-mail] ] . "Cleaned carbs a bit" sounds like not cleaned at all where it matters, the passages and jets feeding fuel.

[@valorquimby9456]

I have this bike but I can’t find the bracket that goes on the throttle cable can anyone help

[@sethdoherty21]

So many that’s what she said jokes to be made lol

[@1k1992]

Please man help I need your help I have the seam bike it’s been setting for 2 years in my grage and I decide to take it off I have replaced the battery and start it start right up but when I give it gas Shutting out when even do any think the soon as I Bosh the gas motorcycle turns of I clean the gas tank and I put new gas in it I open the carburetor and I clean every think In it I make it like new put it back start the bike start right up but same problem give gas bike of please help and my bike have very low mileg

[@therealyoungfue]

Where does that hose go that came off the intakes

[@TheMotorcycleMD]

Your gas tanks fuel valve.

[@maxx_life]

My bike has way more vacuum lines than the one in this video

[@TheMotorcycleMD]

Likely a CA model 👍🏻

[@maxx_life]

I would love to delete all that can be deleted

[@maxx_life]

@@TheMotorcycleMD do you have a patreon?

[@maxx_life]

@TheMotorcycleMD I would gladly make a donation to the channel for a vacuum line video on this bike. This is my first bike, cleaned the carbs and finally got everything back together and now I can't remember where all the vacuum lines go, haha