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Hey everyone, I'm doing a full rebuild on my PD 42 carbs. Ive spent the last few hours scrolling the internet trying to figure out the type of tubing and size between the carb bodies to no avail. Im guessing the yellowed tube is a vacuum tube and the black is fuel line. Does anyone have a...

Hi there! Currently working on my first CB750 build (actually first motorcycle build ever), a 1983 CB750 Nighthawk (with a stock wiring harness from a 1982 CB750 Nighthawk Custom). I'm looking to upgrade the left side turn controls from stock to the K&S 12-0041B. I have the wiring diagram for...

Hey, An un-informed person on electrics here. I've read it's necessary to update your regulator/rectifier to a modern compatible one when replacing your battery with a modern lithium one. I've got an 80' 750k and bought an antigravity 8-cell...

So heres a different question because hoenstly when i bought this bike, the front end wiring harness was chopped to hell and wired up hades ass. So the question is for running lights. Are my turn signals supposed to be light up solid as running lights or not on until selected with the turn...

Hello. New to the forum, so i'll start there. I've had this bike since 2010. Belonged to a good friend of mine who sold it to me, and a couple months later, was involved in an accident and lost his life. I have developed this bike as a tribute bike, but after spending 7 years with this bike in...

So I'm fairly new to working on Motorcycles. I bought an 81 from a buddy of mine a few months ago and have been slowly working on restoring it. I took the front caliper off because I was getting a squeaking noise from it when I was just rolling, When i engaged the brake it was fine. Well, I then...

Looking to install a hydraulic clutch on my 1974 CB750K4 Resto-Mod, has anybody ever done it with any success? I know a new clutch cover will have to be made to mount the slave cylinder too and a new clutch rod. any info would be helpful. Thanks, Dave

I'm looking for a rear rack for my 1983 CB550 SC. I've found a couple on eBay that may fit but they say they are for a CB650, CB750, CB450, etc.. My questions are: "Is the seat and rear fender area of my '83 CB550 the same as other CBs of that year? Or the same as other close years?

Hi guys Can I replace rear wheel from CB 750 Boldor to my CB 750 Custom? I want disc brake on rear wheel. Have a nice day for you all

Hello All I have had the classic honda leaking front dive sprocket seal for a long time, and after several pretend fixes i have started pulling my engine apart to do it properly. And i want to do a little something to increase the power in someway, so thought i would hit up the geniuses...

Hey all, Back early in the summer I bought the Delkevic Megaphone Exhaust for my 1980 cb750k. Link below...

As the title says I just bought a 1978 cb750k and it ran fine except that one of the carbs was just spewing gas out the bottom. So I decided to do a rebuild. Got the kits stripped it cleaned it all good. During the cleaning process I left my bike out and it got rained on ( they were not calling...

I am rebuilding the engine of a 1992 CB750 and came across an odd lock nut when I got to the clutch. It's not a hex nut, it's round with four slots (see photo below). You can only remove it with a special 4-pin socket (OEM part number: 07716-0020203) that Honda is happy to sell you for $60 ...

Recently, I purchased and installed a Honda CB750 CB750K 1979-1983 Low-Profile Solo Café Racer Seat, Model Z2021, from Texavina.com. These are some of my observations, experiences during installation, and a brief review of the seat itself. Photos of my installation are viewable at Texavina Café...

Hey everyone, Recently new rider. Just bought my second bike to learn more about bikes. I got a 1993 Honda CB750 Nighthawk. The previous owner was cafe racer customizing it and did some changes. One of which was adding K&N individual air pods. I was told by him that the I would need to rejet...

Hi all. New to the forum. Have been looking over the posts and appears to be a very professional no-nonsense approach to all things CB750. I recently acquired a 1992 CB750 Nighthawk. Purchased the Accel 140403 coil and wire kit. Am having a tough time figuring out how to fabricate or use the...

I'm rebuilding carbs and keen to keep it all stock. They are Keihin VB42, I've bought a rebuild kit which came with different jets [some numbering on top, others with numbers on the side] Originally the carbs had 68 and 100. Rebuild kit came with 102 and 89. Can anyone assist with the standard...

Hi all, I have recently purchased a 1980 CB750 C with the goal of converting it to a cafe racer. I am very new to working on bikes and have run into some minor issues that I was hoping that I could get some advice on. First, I bought a brat style seat from Dime City Cycles and after I cut the...

Hey guys, as i was taking apart my cb750k carbs, i realized that the stock airbox has this knob sticking out of the back. It seems as if something should connect here but I have no idea what? Can you guys offer some help? My guess is that one of the breather box hoses connects to it? But i am...

Can someone tell me whether the 'oval' fitting petcock on the K3 has to be bolted from inside the gas tank ? It seems like a difficult job. The old one seems to have nuts or square headed bolts from the inside which I have not dared trying to remove yet and the new one did not come with any...

Good afternoon, I recently purchased a rounded (brat style) seat. The link can be found below, http://4into1.com/tracker-brat-style-seat-black/ And was wondering if anyone here has any experience installing such a seat on their CB750? A quick google search revealed the below YouTube video...

hey everyone. I am about to be buying a buddy of mines 83 nighthawk. for 175 bucks! its been wrecked. he bought it. it didn't run near as smooth as he wanted(its had better days) but I'm gonna buy it off him and attempt to rebuild it. ive got my own bike. but my brother is in the process of...

Hello. I been wanting one for along time and finally found one. Its a 73 with sohc 750 motor. It runs good but I plan to strip entire bike and redo everything over time. My biggest question is where is oil dipstick located? Thanks for the help

Hey all, First post, and brand new user. Looking to get a bike for the first time and a buddy of mine is selling a 1982 Honda nighthawk cb750sc. I dont know a ton about bike repair, but I have two coworkers that are incredibly experienced and willing to help me with repairs. The owner is...

I have cleaned the carbs on my 82 750 Classic and now I am putting them back together. I have been using one of the guide that was posted on this forum and for the most part it has been helpful. I have hit a road block. on the 1 and 2 Carb halve, I am installing the choke shaft and trying to...

Hi. I just installed a center stand on my 1978 cb550. I had to remove two pipes in order to get it in there, but that was great practice. All else went very smoothly and everything seems to be in the correct position. However, trying to put the bike ONTO the center stand is a totally...

82 CB750 Custom.......I got the carbs off (that was a task) and have them all broke down and ready to be cleaned. What is the best way to go about this? On other types of carbs I have used brake cleaner and compressed air and some elbow grease. Thoughts?

I am building a SOHC retromod and looking to put a FZR 600 rear (swingarm, wheel, brakes) on a 78 750F... If anyone has already done this mod I would greatly appreciate your input - and the measurements you used to weld the mounting points and tabs to the frame. Aubrey

Hi, I recently rebuilt/cleaned my 1980 CB750F carbs. There are two hose connectors. One for the fuel line from the gas tank and a second one by the throttle connectors on the carbs . I don't recall where the other end of the hose goes for this connector. The connector is between carbs #2 & #3...

to make a long story short, got this awesome nighthawk for a grand. I knew that I would have to do work, it was running when I got it and it ran all summer! then the timing chain snapped... literally snapped, good part was I was in my driveway. I took that bike down to the frame, and completely...