maintenance

Hi all. I've come for some input before I make this purchase. I found a local fellow that is selling a 1982 CB750, that cosmetically looks to be in excellent shape. The price is great, and I am looking for a project, I just want to know if I'm biting off more than I can chew. This bike has...

Hey Everyone, Just started a CB750 project and this is my first day on the forum. I have a 1978 K8 I plan on rebuilding the carbs, But after a bit of research I've noticed that finding parts for the 77-78 carbs is much harder/more expensive compared to the K0-K6 Is it feasible to put the...

So my gear shift likes to "hang up" or gets stuck when down shifting, mainly from 2nd to 1st. It's very intermittent. So, as if I'm in 2nd, I try to down shift and it doesn't want to go in 1st, if anything, it wants to go down to neutral, if you try again, doesn't want to go into 1st. Almost...

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...

Anyone tried EBC Clutch friction plates and springs? Did you like them? Any thoughts? Looking into rebuilding my clutch and considering this brand. Any info is greatly appreciated.

So I am looking into a new air filter for my STOCK air box, have any of you tried these? Hiflo Air Filter #HFA1706 Honda CB750/CB900/CB1000/CB1100...

I'm redoing the forks and there are three part numbers available. Which one is correct? OIL SEAL (35X48X11) 91255-MA6-013 OIL SEAL (35X48X11) 91255-KBH-003 OIL SEAL (35X48X11) 91255-434-013 item 26 in the diagram https://cdn.partzilla.com/diagram/hom/655b123718712b16757a6b33c2d800e6c78ec8d2.png

Hey all, I've got a quick question regarding batteries. I was wondering how the DOHC would handle a 12V-10AH SLA battery? I understand the factory specs are 12V-14AH however the sizing of the 10AH battery just works much better for my build. This one specifically...

Is the Clymer service manual adequate? I know it isn't as good as a Honda OEM service manual but will it be adequate for minor maintenance? You know, oil/filter changes, wheel removal, etc.. Nothing real technical. I'm thinking about purchasing a 1999 CB750 Nighthawk.

Hi, I have a CB750F that has 3K miles. Restored after sitting for 25 years. Took off the left ignition cover plate to check the timing since running rough. Noticed oil leaking into the housing. Looking at the engine schematics can't tell if there's a seal inside, just the lower crankcase...

FNG here. I just picked up a beat up 2000 Nighthawk 750. Gonna do a scrambler (kinda) build, sorta like the Daryl Dixon Bike. I have been searching for a service manual. Found a 1999 manual, are these bikes the same? Thanks, Jay

I have a CB750 K4. It runs great. But if I don't use it for a couple of days one of the spark plugs will foul. This does not happen if I use it every day. What could be the problem? I'm running K&N pods, 120 main jets, 42 pilot jets. 4 into 1 exhaust.

My 78 750k (9500 mi). will engage all gears setting on the stand manually, engine not running. Put it on the street under load and no 5th gear engagement. There are no funny noises or vibrations. Goes to 4th gear and stops ,push as hard as you want ,goes no further. Any body experienced this...

Hello people! I need your help. I've seen this O-ring between the engine body, and when I took it out, it broke by itself (30 years old). The problem is that I can not find the part, to be able to change it. It doesn't appear in the diagrams of the web pages of purchase. For example...

Have a ’74 cb750. Just replaced the battery this week and having trouble with the cold start. I’ve tried switching fuel over to reserve, opening the clutch, but nothing. Kicks over but after about 5 seconds dies on me. Wondering for tips/advice before I take it into the shop. Thanks.

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...

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...

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...

Hello forum, I need some advice from the experienced folks on a blue smoke problem. I purchased a 1978 CB750F Super Sport last week. It has 29k on the clock. The previous owner had it for four years, and it seemed to run well when I gave it a close look before purchase, but I think I have...

Hello Folks I recently purchased a 1981 CB750C. The bike is clean, only 5900 original miles. But I noticed the brake and clutch lever things are quite stiff and the front brake one has a chip at the end..(its sharp like a dull knife..but hurts..lol). Please provide some info on where I can...

so i couple days ago i stumbled across a 1980 cb750 that was last plated in 93 or 94 (plate says 93, ownership says 94) so, the bikes a bit of a mess, off the top of my head heres a break down: no throttle left control switch broken right control switches broken battery cracked open fuel in the...

Got a buddy telling me only use real oil but bike shop recommending full synthetic for old bike. 1978 cb550. I've run only real stuff but curious about pros and cons (if any). Many thanks.

I need to replace shims (probably all of them) on my '82 DOHC. Does anybody know of a place I can order them from? Thanks😎

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...

Greetings ya'll, I've read through the majority of threads looking for my particular issue. I'm restoring a 1975 CB750k5 and I currently have an issue with the clutch. Here's what it's doing: With the bike in gear and the clutch engaged there is no slipping = engine and gearbox connected...

Having a hard time in finding these 2 boots linking the air box to the carburetor here in north america. I found one online store in Europe who seems to have them. Any suggestions on a store closer to us? Thanks

Hey Guys, first time poster here. Last summer, I bought this 82 Nighthawk that had been stored for the past 3 years. Just started my Café build but I need to have the bike inspected to plate it. Bike didn't wanted to start so I started by removing the carbs and cleaned them using the...

Hello, I am relatively new to CB750's and the whole bike world in general. Two yeas ago I bought a 1979 Honda CB750f super sport, The bike was is decent condition and seem to run fine when I bought it, I have driven it up and down the driveway, But never on the road as I did not have yet have...

Hey folks, long time lurker first time poster...anyhow to the point... So i bought a rolling chassis with a basket case motor, I fully intended on purchasing a different motor for the bike as this one is in bits, the PO removed the head but did not keep the rocker arms and shafts in any...

I did a valve clearance check today, the numbers looked like this (from left to right, sitting on the bike) - Exhaust - 0.004, 0.009, 0.002. 0.002, 0.003, 0.003, 0.004, 0.003 Intake - 0.004, 0.004, 0.004, 0.005, 0.004, 0.003, 0.006, 0.004 The compression test I ran the other day gave these...