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  1. Thread: High rpm cutout

    by amc49
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    31

    Set your valves first, nobody ever does it and...

    Set your valves first, nobody ever does it and the single biggest cause of them not revving fully out without missing. Number two reason will be pods if somebody has put them on and then after that...
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    It hovers and must wobble a bit, it allows the...

    It hovers and must wobble a bit, it allows the flow to center it. Positive solid contact would lead to lightning wear.

    Need Keihin brand jets, after market often do not flow right and will not be...
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    Sounds like completely wrong parts set. Pilot...

    Sounds like completely wrong parts set. Pilot will NOT work.
  4. Without knowing the exact fuel amount in a 400...

    Without knowing the exact fuel amount in a 400 tank I'd bet a million the 750 tank is bigger at 5.3 gallons.

    (edit) Just found it, the CB400N, the T model is different style. The N has 3.7 gallon...
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    You are not going to find any dimensions on a...

    You are not going to find any dimensions on a brake pedal as they pretty much work only on the model they were designed to, they pretty much never swap to other models. One MIGHT luck out but no way...
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    For Sale - You need the model, every one is different there.

    You need the model, every one is different there.
  7. Should work fine if you jet up the main jet only...

    Should work fine if you jet up the main jet only maybe by 10 higher than OEM, provided the header is one that 'works'. Use the OEM paper or whatever filter comes in the box, they can even be...
  8. They go rich with the pods, it causes them to...

    They go rich with the pods, it causes them to open slides slower and later making engine richer. Then people think you have to 'jet up' for the pods making it even worse.

    If your plugs are black...
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    Just so you know, it shares nothing at all with...

    Just so you know, it shares nothing at all with the '83 and earlier original Nighthawk based on the 1st gen DOHC. You would be looking at Nighthawk in that '84 year.
    ...
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    750F tanks of the same year are the same as 900....

    750F tanks of the same year are the same as 900. US 1100F are too but be aware of fuel tap size changes. Petcocks got bigger as the years went on, IIRC 3 different sizes used there. Basic F tank is...
  11. Thread: Master Cylinder

    by amc49
    Replies
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    818

    The 425 number is 750 and model, it's part of the...

    The 425 number is 750 and model, it's part of the complete part number. '425' means DOHC 750. 73(0) is the last digits in part number meaning C model. The other number is likely numerical as in seats...
  12. Thread: Master Cylinder

    by amc49
    Replies
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    818

    Read the link--it shows the paint code sticker...

    Read the link--it shows the paint code sticker which is not either number stamped there. The paint code list clearly shows candy muse red as code R-104C-U.
  13. Thread: Master Cylinder

    by amc49
    Replies
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    818

    https://www.motorcyclespareparts.eu/en/honda-parts...

    https://www.motorcyclespareparts.eu/en/honda-parts/honda-color-codes
  14. Thread: Master Cylinder

    by amc49
    Replies
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    818

    https://www.cyclechaos.com/wiki/Honda_CB750C ...

    https://www.cyclechaos.com/wiki/Honda_CB750C

    Says 'Cosmo Metallic' black there. The one I drove was blue and may have been '81 as it had twin disc in front, '80 only had a single.
  15. Thread: Master Cylinder

    by amc49
    Replies
    25
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    818

    It's pretty unusual to have a perfect bore, most...

    It's pretty unusual to have a perfect bore, most will have something pitted in there if bike has sat.

    Regarding the pinhole, you should have TWO holes there, one bigger and the very small one.
  16. Thread: Master Cylinder

    by amc49
    Replies
    25
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    818

    My favorite tool to hone the M/C interior out is...

    My favorite tool to hone the M/C interior out is a piece of all thread maybe 5 inches long chucked in a drill and split on the end right in the middle with hacksaw maybe 1/2"+ deep. Then fold up a...
  17. Thread: Master Cylinder

    by amc49
    Replies
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    818

    Throw it in some very hot water, that may help.

    Throw it in some very hot water, that may help.
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    Absolutely not, the cutoff is '83.

    Absolutely not, the cutoff is '83.
  19. Thread: Master Cylinder

    by amc49
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    818

    Yes, it would have taken little effort to pop it...

    Yes, it would have taken little effort to pop it in when new and o-rings soft. The same problem with lots of car reservoirs now too, made to pop into place and you blast to remove them later. It...
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    Torch is not going to free up a part resisting 80...

    Torch is not going to free up a part resisting 80 pounds of force............UNLESS some d-mn fool used permanent loctite on it. 600 degrees to melt it.
  21. Thread: cases apart

    by amc49
    Replies
    3
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    114

    Service manual here for that...

    Service manual here for that one.....................

    https://moto-odejda.ru/file/HondaNithawk.pdf

    I know it says ru for russia in the link but it's a clean .pdf file, not a hack. Takes a bit...
  22. Thread: 1980 CB 750C

    by amc49
    Replies
    3
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    198

    Pretty sure a blue of some...

    Pretty sure a blue of some sort....................
  23. Thread: cases apart

    by amc49
    Replies
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    114

    Assuming you have all bolts removed from the...

    Assuming you have all bolts removed from the bottom, there are like 4 that go in the top to hold it together too.
  24. Thread: Master Cylinder

    by amc49
    Replies
    25
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    818

    Don't be surprised if it breaks, some do....

    Don't be surprised if it breaks, some do. Sometimes the o-rings get hard as rock and will not deform to peel loose.
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    Your MMO may not lossen anything if it is stuck...

    Your MMO may not lossen anything if it is stuck bad enough, I've seen some where you break various engine parts before the engine comes unstuck, including the cylinder itself. That kiskstarter would...
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