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cb450sc
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  1. Wanted Parts and Bikes
    Howdy! I'm on the hunt for a tank and left side panel for an 85 cb450sc nighthawk. Any help would be much appreciated. Thanks [email protected]
  2. Fuel Supply and Carburation
    I have been working on my buddies 1985 CB450SC, the previous owner tried to rebuild the carb and put A bunch of incorrect parts. I have already replaced the pilot and primary jet with the correct size. The only part I am unsure of/think might be incorrect is the Vacuum piston needle. It is...
  3. Electrical Discussion
    Hello, I have been working on my buddies 1985 CB450SC Nighthawk over the past couple weeks. The bike is able to idle, but whenever any throttle is given it starts to die. it seams to die inconsistently, one sec it would rev alright for a sec then the next it would die immediately. Do you know...
  4. Member Introductions
    hey Stone from Ontario Canada . Have a 84 CB450SC needs work so I thought I would bob it , any others out there , like to see what can be done. Good to meet you all ,
  5. Engine Discussion
    Hi there, I am new to this so be nice... ;) I have taken apart my 1985 CB450SC top engine as there was no compression in the left cylinder. My issue now is I don't remember if the longer bolts go at the back or at the front... Yeah I m a moron! There are 2 bolts with rubber at the bottom, can...
  6. Member Introductions
    Hello, My name is Gene and I am from Boyertown PA, USA. I am an avid Motorcyclist. My love for the sport is not manufactured specific. I have never met a bike I did not like. I have been riding since the age of 6 and I am a lifetime member of the AMA. I enjoy working on and Restoring bikes as...
  7. 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...
  8. Manuals and Technical Documents
    Anyone have the FSM for a 1984 450sc? New to the forum. Thanks!
  9. Engine Discussion
    Hello! I bought a 1984 cb450 Nighthawk (Canada version, possibly the 1983 model) earlier this year. It started cold, worked great on a test ride, then I put it in storage for a few months (with little fuel, maybe 1 litre). The previous owner told me the carbs were timed very recently. Last...
  10. 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...
  11. Project Logs
    Hi All! I just joined the forum as I recently picked up a working amazingly near-stock 1984 cb450sc with newly timed carbs, new chain+sprockets, tires, etc at 33KM. I know exactly what I want to do with it, but given that this model wasn't released in the US (i'm in Canada), there is limited...
  12. Project Logs
    Ok, first post for this thread. Here we go. Got the bike Spring 2017. Didn't run when I got it, figured out some electrical issues, cleaned the carbs, tried a new battery, replaced some fuses, and thanks to the folks here, got it idling roughly. The whole plan for getting this bike was to do a...
  13. Bikes For Sale
    Hello all, I know this isn't the best time of year to be posting this... but my wife is spring cleaning in the fall and wants more room in the garage for winter. I'm looking to sell my Nighthawk 450. I just don't ride it as much as it deserves. I have two kids and not a lot of free time (wife...
  14. Miscellaneous Discussion
    I purchased my 1982 450 Nighthawk fifteen years ago from the original owner. It came with two sets of luggage rack support brackets. One set fit my Nighthawk perfectly and the other set did not. The bracket would hit the side cover but the bolt holes lined up. I was cleaning up my shop and...
  15. 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...
  16. Electrical Issues
    I've got a 1983 CB450SC From what I can tell the electrical system all works as it should except the horn. I can't get it to make any sound by pushing in the button. I disassembled the left controls to get at the horn switch. Looks in good shape - not much corrosion. I am now able to get the...
  17. Project Logs
    Hello All, Just wanted your collective feedback on new tires for my 1985 CB450SC Nighthawk. The stock Bridgestone Spitfires are in need of replacement and I was trying to decide if I should just continue with new Bridgestones or possibly switch to a Dunlop 404 tire. If anyone has experience with...
  18. Frame, Suspension and Steering
    I'm playing the "Which Part is Bent?" game again...forks or triple tree on a CB450sc Hello all, A while back I had some issues with a bent frame up near the head tube of my 83 nighthawk 450. 8 months and almost $600 later that problem is solved. The guy did an awesome job at straightening and...
  19. Fuel Supply and Carburation
    So I pulled my 1982 CB450SC Nighthawk out from storage and noticed something strange while riding it for the first time this year. It started great, choke worked fine, but while riding it when I went to down-shift the revs stayed high (around 4000 RPM), with the clutch pulled and my hand...
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