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1-20 of 26 Results
  1. Mechanical Issues
    I recently picked up a '82 CB450SC nighthawk, and am in the process of fixing it up to be able to ride it. I went ahead and drained the fork oil to replace, and in the process I found that the Air Assist hose was split and wont hold any air. How big of a deal is this? I know it isn't supposed to...
  2. Fuel Supply and Carburation
    Hi all, I'm doing a rebuild on some VB22G's for my new-to-me nighthawk. I attempted to remove the primary emulsion tube underneath the #72 jet, and immediately broke it. I got them both out with some screw extractors, but a quick look on the internet and it's become apparent that there are none...
  3. Manuals and Technical Documents
    Print on both sides of an 8.5x11 sheet of paper, trim, stack, staple, and you should have a document compartment sized owner's manual for your reference without dealing with the scalpers on eBay.
  4. Engine Discussion
    Recently I had bought a 1985 CB450SC Nighthawk and had noticed the carbs were dirty/clogged. I took the carbs off and cleaned the jets, the bowls, the accelerator pump and just about every part of the carb was sprayed with carb cleaner. When I reinstalled the carbs I also had the stock airbox...
  5. Engine Discussion
    I recently got a '85 CB450SC Nighthawk and im looking to replace the piston rings but unfortunately im unable to find a option that isnt overpriced or from China. Im wondering if the piston rings of a 650 Nighthawk would fit the piston of a 450 Nighthawk piston head?
  6. Mechanical Issues
    Hello everyone, At the end of last season I heard a 'pop' sound that seemed to come from my front tire area of my '84 450 Nighthawk. I got off the bike, inspected it and couldn't see any issues after moving it slowly. I did notice every few feet there would be a clicking sound which sounded...
  7. Member Introductions
    Hey everyone, My name is Brandon and I got my 1984 Honda Nighthawk 450SC last Spring. I got my full licence on it and have been loving the size as a starter bike. I had ridden a few years ago, but my licence expired. Getting into riding again has been such an awesome experience! I live on...
  8. Engine Discussion
    Hello forum! This is my first post on here so please excuse my lack of knowledge, I recently purchased a 1986 Honda CB450SC Nighthawk! It needed a new head gasket and a Helicoil repair on one of the head bolts. I did these repairs following a Clymer manual and the instructions for installing the...
  9. Member Introductions
    Hey all, I'm from British Columbia, Canada. I'm looking at possibly picking up a basket case 1982 nighthawk 450 as a first bike. Apparently it was running and was taken apart for customization but then the guy lost motivation. It's in pieces but apparently it's all there. He only wants $250 for...
  10. Fuel Supply and Carburation
    Good morning everyone! I recently picked up a broken down Nighthawk. This is my first time working on a motorcycle. I have a decent amount of experience turning wrenches thanks to being a Jeep owner. After my friend helped me run some diagnostics, we got the bike to start running and idling...
  11. Engine Discussion
    I have a 1978 Honda CB 400Tii with a Frankenstein motor that is giving me trouble. I found a '85 Cb450SC motor that I was considering buying. Before I buy, I have a few questions: Does this motor have the same bolt pattern? Will it work with my electronics? Can I fit my 21b carburetors...
  12. Electrical Issues
    Howdy Folks, I'm working on a 85 450 nighthawk with a front left brake caliper that's unsalvageable. Ive been looking for replacements and I'm wondering if anyone knows if the calipers on other twins of around the same time are interchangeable. Thanks.
  13. Member Introductions
    Hi all! I have my dad's 1986 Honda CB450SC I am attempting to get going again for him. Replaced the battery and now working on it not wanting to start. I think I found some answers already searching around. I am going to try disassembling the push start housing and cleaning the contacts and...
  14. Engine Discussion
    Hey guys. Right now I'm working on a 1982 nighthawk 450 project. I had a seized engine, so I bought and am in the process of installing a new one. An issue I have is that the lever on the right side panel attached to the clutch cable is stuck. Off of the engine the lever on the panel (I'm...
  15. Electrical Discussion
    I just bought an old 1982 450 nighthawk. It was in great condition for its age and runs but I have an issue with the ignition that makes it pretty much unridable. The key needs to be held in just the right way to get it running. I figured the best and fastest way to deal with it would be just...
  16. Electrical Discussion
    Hello! Got my new R/R in the mail today, and did a video of me going through the process of replacing the stock one, as well as the battery. Its a bit on the longer side, but I wanted to be thorough and document the small hiccups in the installation I went through. Hopefully at some point or...
  17. Engine Discussion
    Hello all, I have a 1982 CB450SC. I recently changed the oil on it since the previous owner probably hadn't changed in about 5 years, but I didn't change the filter. I added Castrol 10W40. Now I'm having a few issues that I wasn't having before. When the bike idles, everything seems to be...
  18. Member Introductions
    Welcome Everybody, I'm totally new motorcyclist who just passed motorcycle driving license. I have my first bike every since one week. It's CB450SC Nighthawk 1983 in original painting and looks like fully original stock machine. I like it very much. I hope to use it long time. To be honest I...
  19. Wanted Parts and Bikes
    Hi there, I'm looking to see if anyone has a tachometer for an 82 cb450sc, or any advice on how to repair one? Mine started jumping and quit working, so I took it apart and saw that the spring inside has broken. Not sure how to fix it, so might be easier to see if anyone has an entire assembly...
  20. Member Introductions
    Hi everyone. I joined the forum in Spring 2015 after acquiring a new-to-me 1983 Honda CB450SC Nighthawk. It's in reasonable shape and the PO painted it a really nice dark green (incl the original chrome front fender). I've posted in a few other topics and still have a few things to work out but...
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