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cb400

  1. CB or CM 400?

    Non-Model Specific Honda Twin Topics
    Hi all, recently traded my 1980 CB250 Superdream for a similar-aged CM400T. I like the styling, the quality of the build and the extra cc (obviously). Seems to start very easily, which was the main reason I wanted to change. Removed all the luggage clutter (panniers, rear luggage holder and...
  2. CB400T II Bogging at 1/2 throttle.

    Fuel Supply and Carburation
    Hey everyone so I have a 1978 CB400T “2” and this damn thing won’t pull through my rpms and bogs hard after 1/2 throttle until it dies if I keep it WOT. Low end power is there and goes great. And I am familiar with the “correct” way to pull these apart and clean them, I did read the forum on how...
  3. 81 cb400 vin # help

    Miscellaneous Discussion
    So I just recently purchased a 1981 CB400. The bike did not have a title when I got it, and being new to honda street bike I took the sellers word. I called my local dmv to make sure it was not reported stolen and it checked out ok. That being said I am having conflicting vin results. My dmv and...
  4. New Member- Excited to be here!

    Member Introductions
    Hi Everybody, Just here to introduce myself. I'm Jake and I live in Eugene, Oregon. I just picked up this 1978 Honda Hawk II. I own a Grom as well that I bought from my girlfriend after she upgraded. Wanted the Hawk because I was looking for something with a little more power (I'm new to...
  5. left-hand control wiring problem

    Electrical Discussion
    hey guys, ok, so I have a 1978 cb400 hawk II that I've done some work to and after putting everything back together I see a strange problem. I replaced the left-hand controls completely, there was an electrical problem with the horn button that started a small fire in the controls. The horn...
  6. 1978 CB400TII - St Paul, MN

    Bikes For Sale
    For sale is my 1978 CB400TII. I believe there is an issue with the cam chain tensioner. I had it out around town two summers ago, and the chain rattle from the engine starting acting up. Last summer, I tried to troubleshoot, but couldn't fix the problem. I'm a renter and won't have any garage or...
  7. CB400N electrically dead over winter?

    Electrical Discussion
    Hi everyone My '82 CB400N somehow lost all electric connecting over winter. When turning the key in the ignition there's no response whatsoever. No dash lights, no head/tail lights, nothing. I've had the bike safely stored in the garage over winter, unplugged the battery and kept in on charger...
  8. Proud Grampa of a '78 CB400

    Pictures and Videos
    My son recently got a job and had been saving for a bike. I bought a CM400e a few weeks ago for me and him, but he was anxious to spend all that money he's making at McDonalds. He was all over Craigslist looking at all sorts of junk he could afford. I talked him out of all of it, until he...
  9. Exhaust header and muffler removal dilemma

    Miscellaneous Discussion
    Bike: '79 Honda CB400 TII Hawk Background: I've been having idle issues lately so I'm doing a carb clean and consequentially a rebuild because why not. I figured since I was going through all of that anyways, I should go ahead and rejet the carbs (from stock) for a new set of mufflers (stock...
  10. WANTED: '78-'86 CB/CM 400/450 Stator

    Wanted Parts and Bikes
    I desperately need to find a stator from a '78-'86 CB/CM 400/450 bike. I've been searching all of the PNW and I can't find one. If anyone knows anywhere I can get one, I'd greatly appreciate some info!
  11. CM400T and CB400T Hawk Parts

    Parts For Sale
    Hey everyone, Have some parts I need to get rid of. Pictures will show the condition of the parts. CM400 parts are better than the CB, which sat under a tent for a while (PO, not me). The CB400 has some parts left on the frame. Let me know what you need/see and we can go from there. If you...
  12. 1977 CB400T Build with Pics. Australia

    Project Logs
    Hi everyone, I thought I had better post some pics and details of my cb400t rebuild. It has taken 6 months so far and been enjoyable to turn a rusty POS into something nice, although I think I will start with something cleaner for my next build. Everything has been cleaned/rebuilt/sand or soda...
  13. Poor performance at high speed CB400/450

    Fuel Supply and Carburation
    Hey guys, I just recently got my 1978 CB400 on the road. I'm having issues with power at highway speeds. I have trouble accelerating past 100 kph, and have only gotten it to about 120. The bike seems to bog on WOT regardless of speed, but if I hold it open at highway speeds, it bogs down. It has...
  14. '78 CB400T II - Questions and guidance on dropping engine to replace bottom crankcase

    Engine Discussion
    Hey all. Before I've posted about my bike and it's oil leak. PO over tightened the oil drain bolt, and this resulted in a crack along the threads. He/She did a ****ty JB Weld job on it, and it's leaking. The leak has gotten worse over time. I decided that I want to fix this problem once and for...
  15. Help! Broken engine screw.

    Tips And Tricks
    I am really new to motorcycles and last month purchased a 1979 cb400. Long story short I was attempting to replace the head gasket when I BROKE one of the top two screws in half (not even sure what to call the part, the top screws when you are first taking off the top of the engine). Anyways now...
  16. 1978 Honda CB400T Electrical problems

    Electrical Discussion
    Hey there, so I'm pretty new to the world of restoration, and I know next to nothing about electrical systems. I bought a running cb400t a few months back, test rode it and everything seemed to work well. I packed it up in my trailer and took it home. I wanted to go for a quick ride around the...
  17. Newbie needs guidance on purchasing project bike

    Engine Discussion
    Hello everyone. Novice here. I recently came across what looks to be a pretty decent bike albeit the mileage seems high,~22k, or maybe appropriate given its age. It's a '79 Honda CB400. The problem is that it currently is not running, but the owner assured me that it was running last year...
  18. 1978 cb400tii hawk compatible tires

    Tires, Wheels, and Brakes
    Hey, guys, I'm new to all this and I need to replace my tires. I want to go with a slightly bigger tire with a taller side wall but I'm not sure what size to get that won't require me to change anything. The original sizes are 3.60 19 on the front and 4.10 18 on the rear. Any help and...
  19. 1978 honda cb400t hawk 2

    Project Logs
    Hello, I'm new to the forums and recently bought a 1978 cb400 hawk for $325. The exhaust is rusty but it does run. I already bought a new oil filter as I plan to change the oil soon. I also cleaned the inside of the gas as it was rusty. I plan to turn this into a nice cafe racer style bike. I...
  20. 78 CB400TII Engine stutter

    Engine Discussion
    Hello Everyone! First off, I have been reading this forum for over a year now and have gained a wealth of information! Thank you all very much! Last summer I broke one of my cylinder head bolts and did a terrible job drilling it out. Since then I have had an engine stutter while accelerating or...
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