Topic: Brake rod assembly help-FINALLY W/Pics

[rhinoracer]

This is how the setup is fitting but I think the arm in the drum is pointing too much to the rear.

The spring and adjusting nut are compressed halfway and the pedal lever arm is pointing almost upward, in fact there's little rotation left as it hits the bottom of the swingarm.

Any suggestions?

[martino1972]

how about a pic from the real thing???

[rhinoracer]

It would look exactly like what I just drafted  . I'll mount them up again and take some pics but it won't be until monday when I go back to the shop.

Brake pedal did swing w/o hitting the swingarm and the drum side arm was pointing down when I took it apart almost three years ago so I was just hoping somebody would tell me I was doing it all wrong.

[bryanj]

Thats the position the rear arm is suposed to be in but dont understand whay you mean by pedal sticking upright

[Johnie]

Here is a pic for you.  Click on the pic to make it larger.  If this is the standard set-up you should be bolting the lower hub rear brake stopper arm first.  That will give you the correct hub position before you attach that spring adjusting arm.  It appears from your picture the cam arm on the left is pointed to far back.  See my pic as it is mainly pointing down.  Good luck with it...

[Raul CB750K1]

Because your torque arm is pointing downwards, doesn't it?   

[rbmgf7]

are you trying to draft for a rearset? i don't see why you would need to for the stock setup.

[rhinoracer]

Because your torque arm is pointing downwards, doesn't it?   

I get the feeling there's the answer hidden in your response   but I'm kind of slow this morning. Yes it does mount like this was the case although I'll have to go and check again.

Bryan, what I mean by the pedal sticking up is that the 'pedal shaft tab' (where the rod attaches to) is pointing almost vertically up too close to the swingarm. If the brake pedal is depressed, this tab will immediately hit the swingarm and stop turning.

rbmgf7, no I forgot to take pics of it and I don't have a scanner so drafting in a piece of paper was not an option. Didn't take more than 4 minutes as it' not up to scale.

Thanks for the pic Johnnie, that's how I think it should look too but mine is 45deg +

[martino1972]

im wrecking my brain how it is possible for the pedal shaft tab to hit the swing arm right away...

[greenjeans]

There are (at least on mine) 2 small dots - 1 on the splined shaft coming out of the drum and another on the brake arm.    Arm should only be in that position.  To me it seems like your hub is rotated too much toward the front of the bike.   Could it be possible that the other rod/bar that connects the drum to the frame (to keep it from rotating) is from another bike ?  Or, have you attached it yet ?

[rhinoracer]

Thanks for the pics greenjeans, I didn't notice the dimples but I didn't look for them either, will do tomorrow.

Here are my pics finally, something is not right 'cause looking at older pics it did assemble correctly and worked properly before disassembly.

[Joel]

Should the pedal arm shaft be rotated more toward the front of the bike in the rest position?  That is assuming there's a way to rotate the pedal arm independently of the actual pedal.

[Raul CB750K1]

Should the pedal arm shaft be rotated more toward the front of the bike in the rest position?  That is assuming there's a way to rotate the pedal arm independently of the actual pedal.

Exactly. The pedal arm must be in front of the swingarm. It moves towards the engine when the pedal is actuated

[rhinoracer]

That makes sense, I'll try it tomorrow. Thanks

[Johnie]

You guys are correct.  I just went out to look at mine and it is not very easy to see either with the frame in the way.  But the pedal arm is in front of the swing arm.  Once you have it there that should pull the entire system forward right where you want it.  And like greenjeans says, look for those dots on the pedal cam arm and stud.  That will give you an idea where that arm should go.  I think this will solve your brakes.  Good luck with it.

[cb750k7]

Hi all,

Not willing to steal this thread but I have a similar question.

My Brake cam was broken,  see attached picture,  my guess is that I lost the front Rod/Bar screw,  so when applying the rear brake, the shoes expanded to the drum, locked together and without the counter force of the locking rod the cam just sheared off.

Am I assuming right?

Since I "lost" the two dot marks,  what is the correct alligment trick?

Anyway,  I am going to secure the nut with proper means.(suggestions?)


Regards

Jona

[mystic_1]

The correct alignment trick is, get a new brake cam

Seriously, that part looks pretty bad, looks to me like the remaining splines at the broken end are twisted.  Part has likely suffered structurally and should not be trusted.

As far as the brake arm mounting bolt, the stock arrangement has a cotter pin to secure the nut.



mystic_1

[cb750k7]

The correct alignment trick is, get a new brake cam

Seriously, that part looks pretty bad, looks to me like the remaining splines at the broken end are twisted.  Part has likely suffered structurally and should not be trusted.

As far as the brake arm mounting bolt, the stock arrangement has a cotter pin to secure the nut.

mystic_1

Hi mystic_1

Ofcourse a new one is on its way, cmsnl were a little heavy in communication,  I found DSS very cooperative and the price was right.
It's the broken one in the picture and the whole crown is missing.

I'll look for bolt with a cotter pin.

TNX

[bryanj]

Never seen one shear like that, even if the torque arm falls off the brake plate usually just goes round with the wheel tying the operating/adjuster rod in knots

[cb750k7]

Never seen one shear like that, even if the torque arm falls off the brake plate usually just goes round with the wheel tying the operating/adjuster rod in knots

Well, there is allways the first time...

(I have been told the I am special. ...)

[bryanj]

Well one of McGinty's laws (7th i think) sez that anything that can go wrong will somewhere for somebody.
!st one sez if a part can be fitted the wrong way round some idiot somewhere will do it

[martino1972]

Well one of McGinty's laws (7th i think) sez that anything that can go wrong will somewhere for somebody.
!st one sez if a part can be fitted the wrong way round some idiot somewhere will do it

wasent that mister murphey's law???