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brakes

  1. Charlie-D

    74 CB750 needing to get it road ready.

    Hi, My father in law just gave me his old drag bike which is a 1974 CB750 (built). He use to drag it in the mid 90's but crashed on the track, so after his hospital stay he re built it and it stayed in the garage. I ride a 2009 Harley heritage so these older bikes are a new thing for me and...
  2. E

    Replacement Brake Lever - Nissin master cylinder

    I recently purchased my first bike (82 CB750C) and doing a few minor cosmetic fixes. Both levers had the ends broken off so I ordered a set off ebay that was an OEM replacement. I got the clutch lever on just fine, but it appears that the brake master cylinder has been rebuilt. The replacement...
  3. R

    Clearance between the outside surface of the brake disc

    Clearance between the outside surface of the brake disc and the right side of the calliper holder. On my 1982 CB750 it is calling for 0.7 mm or 0.028 in feeler gauge in the manual. I can't achieve. Once I tighten the axle in for it to shoulder on that spacer it can't be achieved. I have...
  4. F

    80 CB750f Rear Brake

    Does anyone know of a alternative rear brake master cylinder? Mine has pretty bad rust and corrosion from years of setting. At this point i don't think rebuilding is an option. Does anyone know of another brake master cylinder that bolts up the same?
  5. O

    Stabilizer bar broke while riding

    As I was riding my 1980 CB750K on Sunday the bolt that holds the stabilizer to the rear hub decided to evaporate, or at least that's what I think happened. I was on the highway going about 60-70 mph and all of a sudden I felt something snap and the bike went all wonky. Luckily I was able to gain...
  6. W

    Brake pad/caliper identification help

    Hello all, I've recently purchased a project bike that is kind of a basket case. The prev owner had the frame powder coated and I can't read the number to identify the year for parts. I can sort of make it out and I THINK it is CB750K-2714786, which would put it at a '76-'77. The motor...
  7. J

    Front Brake Weak and leaking

    Guys, I'm looking for a little help. My 74 CB 750 front brake always worked great. I went overseas for three years and get it back out of Dad's barn this spring and now the front brake is weak and it is leaking around the handle area. I took apart the caliper and such and it is in great shape. I...
  8. R

    Bringing a 1978 750F back to life after 28 years in garage storage. Brake issues.

    Hi everyone, I am a first time poster and am really glad to have found this site! I rode a lot from 75-86, but a couple of very close calls over a three week period involving 4 wheeled idiots running stoplights and just missing me convinced me to stop. Now that I have an 18 year old son who...
  9. J

    Comstar to spoke wheels conversion

    Hello everyone, I recently bought a 1978 CB750 K7, which has dual front brake disks and rear brake disk. I want to change the stock comstar wheels for stainless steel spokes wheels but I'm having some issues in finding the right hubs for the conversion. I have seen a lot of different hubs from...
  10. J

    Bore size on 71cb750 master cylinder?

    I don't see any numbers stamped anywhere.. Also, plunger seems to compress with ease. If that's the case..should I rebuild or "if it ain't broke, don't fix it"? And is pitting in the bowl going to affect performance? Thanks!
  11. Kielg

    Rear brake issues?

    Hi there, Last summer after I got my rear tire changed, my brake stopped working. the brake pedal presses completely down with zero resistance. I've read that it may possibly need to be bled, anyone have info on how to do that?? I know how to do it in a car and i've seen some videos of bikes...
  12. ScottinNY

    Front Brakes NOT working properly

    I have an 81 CB750C that I got as part of a trade deal. The bike had been sitting for a few years. All original. 7K miles. When I got it, the calipers were stuck, and you couldnt move the front tire. Got it home, pulled the calipers, cleaned them, didnt change anything. The rubber and pistons...
  13. ScottinNY

    What year(s) front calipers are compatible and can be used for a 1981 CB750c?

    I just picked up a 1981 CB750C. The front pistons were frozen in the caliper. I popped them out using a grease gun. The pistons are shot. Pitted, damaged, you name it. It looks like some one before me tried to pry them out using some unknown device, and really messed them up before giving...
  14. T

    78 Front wheel sticking using front brake........

    Hi. Need some guidance / advice on this, bought a caliper for the bike, new pads, new flexi-hose and steel pipe............ the front wheel sticks when front brake is applied.have bled the brake and no issues there.............. the pad returns to the caliper if i take the caliper off and put it...
  15. Stick405

    Front Brake

    New here... Here's a few pics of my trike with a little glamour thrown in... Figured you folks would have some ideas... This is a Chevy Trike with a Chevy Cavalier engine and a 1971 CB750 front end.... The bike scoots but the front brake sucks..... I rebuilt the master and caliper with new...
  16. W

    Vfr rims and brakes on 79 CB750F?

    Good afternoon everyone! So, today I purchased a sport kit for my 750 (very excited!) as well as a set of rims and tires off of a Honda VFR. I believe it was a 750 as well but I can't be sure. I was wondering if anyone had success fitting these type of wheels onto a Cb750? I am already...
  17. M

    Frt caliper binding

    I'm new to this forum. I am restoring a 1975 K5. When I tighten up the caliper bolts, the static pad binds the disk up and will not move. I have cleaned the caliper piston. The pads appear tho be new. Is it possible that they are incorrect for tis caliper? The wheel unbinds if I loosen up the...
  18. J

    First Cafe Build, Someone help me out!!!!!!!! 93 CB 750 Nighthawk

    Hey guys, brand new to the forum. So I just bought myself a 93 CB750 and its in OK shape, could use some work and thats why I have turned to you guys. Suspension: I noticed when I test rode the bike was the extremely soft front forks. Can literally dive them to bottom out just by rockin it...
  19. L

    1982 cb750c front brakes

    OK, rebuilt both calipers new seals and piston,(twice) bleed the brake till no bubbles. It has aftermarket master cylinder. I have done everything possible to get these brakes to work. even back bleed them . Still have spongy brakes. 2 pistons on each caliper. Need to pump the lever a bit to...
  20. Daren

    Found alternative CB750F rear master cylinder rebuild kit.

    To all those which have searched for an alternative rebuild kit for the 75/76/77 CB750F series rear master cylinder know they are hard to find and expensive when you do find them, I rebuilt mine with the kit designated for the GL1000 Honda part #43510-371-305. It's exactly the same as...
  21. J

    cb750fb rear brake

    hi just after advice on above rear caliper,as this bike ive recently tided up the rear caliper mount is touching the disc ever so slightly on the outside more than the inside is this normal,as ive never seen another cb750f(1981) around these parts(uk) to compare with,its as if the disc is to wide ?
  22. Daren

    CB750F1 rear master cylinder issues

    Hoping someone can help. To save money I cleaned and reassembled my rear master cylinder rather than rebuild it. But I do have a very, very slow leak. As owners of the F1 know the rebuild kit for the rear master cylinder is almost unobtanium and expensive when found. Almost $90 on ebay. Does...
  23. motogtp

    Weepy brake?

    I occasionally see a drop of brake fluid on my rear swing arm (pretty sure because it eats through the paint). The reservoir cup always seems to have a very light fluid "sweat" on it even if I wipe it off. The diaphragm and cup seem to be in good shape with no apparent leak source. I am...
  24. K

    69-78 k0-k8 dual front discs, with leading calipers?????

    well, i rode my cb750 k8 for the first time today, loved it! however braking performance is shit! i came from riding a zxr750h1 so i dont expect it to be that good, but this is garbage. I want to do a dual front disc conversion. Both fork legs have the same brackets and mounting holes. So my...
  25. P

    Compatible Front ends for 78k

    Just wondering what front ends are compatible with a 78 cb750k? I am looking to purchase a front end off a 79 cb750f that has dual disk brakes in the front. However, I am not really fond of the wheels on the supersports and would rather use the wheel that is on my bike. Does anyone know...
  26. C

    master cylinder lever

    hey guys I was wondering if anyone knows if the brake lever for the dohc cb750 and cb650 would fit the early style all metal master cylinder ? I like the look of the new levers with the finger grooves
  27. S

    Extremely weak front brake...

    Hi guys. I have a 1978 cb750k which despite my best efforts, is refusing to brake effectively (front brake only, rear is great). In my troubleshooting journey I have... Replaced both brake pads with new ones Replaced brake fluid Tested system with a brand-new master-cylinder Bled the system...
  28. B

    Intermittent no rear brakes?

    Alright you wrench heads< said affectionately..As the riding season nears end...((Here in Ohio, I have a loss of pedal on the rear caliper. I have bled and re bled the rear master cylinder at which point it's fine and then when I ride the bike I loose pedal completely until I pump it up coming...
  29. pidaster

    Drilled my brake rotors

    I decided to drill my brake rotor this past weekend since I needed to get rid of the squeak. I put the rotor on my lathe and gave it some sanding and deglazing, then on to the drill press. Wasn't as hard as what I read from many people. I used one regular metal/wood drill bit at 250RPM on my...
  30. A

    new rear brake caliper

    this is my first post so i'm very excited to be involved in this awesome forum. I just bought a '75 super sport to rebuild and my rear brake caliper is unrepairable and i need a new one. i'm trying to figure what the best option would be for wether its aftermarket or an original brake. i would...
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