sohc

  1. W

    Howdy all, i want to purchase and restore a 1975 CB750

    Howdy all, i want to purchase and restore a 1975 CB750. I'm not even sure how to begin. I am shopping for a hopefully running 1975 Honda CB750. I think what I'm looking for is a K model, not the cafe style. I'm not necessarily a natural mechanic but can still turn a wrench. I don't want a...
  2. N

    What's going on here?

    I really need some help here. As you can see in the photo, my carburetor cable and linkage is obviously very misaligned. It's probably off by a good quarter inch or so. I see no way to correct it and I see no room for adjustment from side to side. Anyone have any ideas and thanks in advance.
  3. C

    71 cb750 starting after 30yrs?

    Just got my hands on a 71 cb750 that has been garage kept for the past 30yrs. It’s a very well kept bike. I got it for free. Any tips before starting a bike that has sat for 30yrs?
  4. D

    Size of bolts for oil pump?

    Hi, I'm going to mount my oil pump back in the sump but I can't find the size of the bolts anywhere. I assume its M6 but how long should they be? (And no I don't have the old bolts. I bought the engine and I got the pump on the side). Thanks guys! Dan
  5. T

    Carb Tuning, better throttle response

    Hey guys, Trying to get the bike tuned a little better, Right now from at Idle when I give a large throttle blip there is little response/ the bike almost dies. I cant be a bit more gradual and its ok. Same for once I'm at a bit higher RPM. Fuel accel pump is working. Currently only non...
  6. B

    what to try next?

    New guy to the forum, Just purchased my 74 CB 750 from the original owner, he was a wonderful guy in his 80s that just had a hard time letting it go. He would start the bike often but it had not been ridden for years. I have had the carbs rebuilt and syc. replaced the plugs and coils and wires...
  7. G

    73 CB750 Carb Jetting and Idle Problems

    So, this is it, the last thing to do on my build before the bike is up and running, and it is stumping me. I rebuilt the carbs when I rebuilt the top end of the engine, and thoroughly cleaned them and bench synced them at the time. I am running pod filters and a 4-1 exhaust, and when I first...
  8. pregrid

    What is this?

    Ran across this during disassembly of me '74 750. Anyone recognize this?
  9. E

    Best Big Bore kit for 74 CB750 and other mods

    Hi everyone. New to forum and sorry if this thread already exists. Thank you for the add. Just brought home a 74 cb750 my first... Going to be my winter project and I will be tearing down engine mainly for cleaning and rehabing. Motor run wells and dont need to do much from a functional stand...
  10. B

    Just got bitten by the cb bug

    New to the site and now obsessing over all of the possibilities I have w my new 73 750...It's rough but just ordered bunch of new parts to try and get her running before I get too deep.
  11. L

    exhaust question K6

    Hi, absolutely new here, but not to CB750's or motorcycles. I am extremely lucky and i wont hide that fact. I had a '75 CB among other bikes back when i as young as i am old enough that they were common back then. 30+ years ago, but that is for the introduction thread. I found a 1976 Cb 750K...
  12. K

    K7 seat Hinges ?

    Hi Guys Anyone out there knowing where to get the seat hinges for the Honda 750 K7 model ? Only have a drawing of them from cmsnl and they look different from the hinges fitting a K6 …. I have invested in a repro K7 seat but no one has the hinges for it :confused: Any ideas ? regs
  13. K

    Lack of Oil pressure 750 K7

    Hi there Have a K7 from 77 Bike hasnt been running since 1990 :) Everything cleaned up New oil , filter , battery , sump cleaned Starter runs fine and motor fires up fine - good compression - has 40000 km on the clock Problem is that engine oil lamp doesnt turn off when running I...
  14. C

    Wanted 1977-1978 Honda CB750 K8 seat or pan

    Hello. I am trying to find a seat for my 78 model. I looked on ebay and apparently this is a hard to find part. I will buy the whole seat or just a solid pan. Thanks.
  15. C

    new here just checking in

    hey new here and my dad gave me his old bike which is a 72 Honda 750 in a burnt dark orange color. BIKE HAS LITERALLY 1050 Original MILES. not a typo either. I know the bike has a different exhaust on it and il take some pics because I would like to figure out what type they are. I also have the...
  16. B

    Oil leak near ignition

    Hello, I am restoring this ‘74 CB750 SOHC, I knew the engine was running without any big issues so I put it back in the frame. It starts perfectly but after a while (when the engine is hot enough) it starts to leak some oil behind the ignition. I’m not sure if it’s the rubber O-ring or the...
  17. Veloandy

    Veloandy's 1977 CB750F

    Hey Everyone, Thought I'd post the story of my 1977 CB750F. All my moto-buddies have newer bikes, and all of my gearhead buddies are into 4-wheeled vehicles, so I'm hoping this forum will be a nice way to keep track of what I've done and maybe get some emotional support! I bought my bike...
  18. G

    '72 Carb Air Screw

    I've finally got my '72 rebuilt and running, and am on to adjusting the carbs. I have pods so I will be rejetting, but for the time being, I just want to get it to a functional state. I looked in the manual, and it depicts a very large multi-slotted airscrew. This is of course nowhere to be...
  19. T

    CB750 Project 1978 K8 looking for some tips

    Hey Everyone, I've Been working on my CB750 for a few months now and have found a pretty decent amount of help on the forums. Before the bike was barely running and wouldn't idle below 2000 rpm, Now its quite better but still a ways away from running well. I'm not a mechanic so don't be...
  20. A

    Lost in the sauce

    I purchased a 1977 cb750 for a weird wacky scrambler build a few months ago. Work kept me busy and I slowly tore things apart. In doing so I discovered the previous owners got fairly hands on with the wiring, cutting bits and pieces and adding in their own hackjobs as they went. Upon discovering...
  21. D

    Motorcity 73

    Hey folks, Howdy from Metro Detroit, MI. New to the forums and the CB, but not to bikes. So here's my build thread. Friend of mines bought a house and the original owner left his 73 CB. Original owner said he no longer wanted it so I got a phone call and now its mines. Haha. Going in my...
  22. X

    Field coil wiring and testable values?

    Got a 77 CB750 (not sure which model) that’s been bobbed by previous owner. I’m trying to diagnose a 0.0v battery reading while at idle & throughout rpm range. Wiring is “ custom” to say the least. 1st of many questions is. “ where are the white and green field coil wires supposed to be...
  23. K

    Airbox installation

    Hi Guys Having trouble with putting on the airbox , connecting air rubber tubes proberly to the carburettors . They rubbers act like they are to short and pulls out of the airfilter case when they are in place opposite on carburettor …..its driving me insane now :laugh: Is there any tricks here...
  24. G

    M-Unit All lights flashing Help

    So I'm nearing completion on my 1973 Cb750 build, and decided to wire it up with a Motogadget M-Unit Basic. Everything had been going well, and I was sorting through my ignorance of wiring switches to ground side when I hit a snag. I had just finished rectifying some ground issues, and had...
  25. U

    plugs fouling

    Hi, I posted on my other thread(with same user name) as well, caus I didn't know if that post would show up as new. 74 cb750. My plugs foul(carbon up) after just a couple miles and just can't come to the problem. just did compression and good at 148-150, all 4. and it did the SAME before new...
  26. M

    Voltage drop at Key Switch

    New member working on a 78 CB750A. The bike isn't charging, at the battery I am getting 12 volts, at the regulator I am getting 10 volts with the key on and the bike not running. I checked the volts at the key switch, 12 in on the red wire and 10 out on the black to the regulator. I tried...
  27. C

    Voltage to coils.

    Hello Thanks for getting back to me on my voltage issue. After checking all connections and grounds I am still only getting 9.8 volts to coil wire. Getting 12.4 at battery. Need help. Thanks.
  28. kmanator

    1978 CB750 Dirt Bag-R Project

    2 Barn fresh CB750's=$150.00 New tires ,MX Bars,fenders& canvas saddle bags=$150.00 1000 foot rooster tails,75MPH on Local State and Federal gameland access roads on a 500lb machine=Priceless I picked these up a few months ago..The Deal came up and I couldn't refuse,I have a few other bikes...
  29. N

    SOHC compression advice please...

    So I just completed a complete rebuild of my '75 SOHC. New pistons .050" over, good quality gaskets, Viton valve seals, stock cam. Head was professionally rebuilt and a reputable machine shop did the boring. Has 22psi oil pressure while cranking. I decided to compression test it just to be sure...
  30. 7

    Ignition disaster, need help

    Recently my bike has been running like crap, breaking up on acceleration, poor idle, etc. I played around with several ideas then decided I needed to check out my coils. I discovered I had nothing on my 2&3 coil. I figured if I was going to replace one, I may as well replace both, so I ordered...
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