[bryantjt]

Took the cover off of Kim's 79 CM400T to figure out why the brakes were so weak. The above is what I found. I already need to replace the white plastic cup since it is very weak and cracked from age so there's $30 from bikebandit, as well as the diaphragm and cover since the diaphragm is disgusting and the cover is warped another $30-$50. I need to decide if I should bother cleaning the above or just replace everything with a generic master cylinder from e-bay like this click here and get a custom stainless steel line.

What's the verdict from those who've been here before? Clean and repair or just replace and get a new hose to match the new master cylinder?

 

[tbpmusic]

What's the verdict from those who've been here before? Clean and repair or just replace and get a new hose to match the new master cylinder?

Just get the new one off EBay - bolts right up, no muss no fuss, no leaks, works great.

 

[krukster86]

Haha my stock one had that stuff too when I took it apart. I bought a shiny new aftermarket one instead.

 

[Bird76Mojo]

I think you'd be pleasantly surprised if you bought a new master, stainless line, and deglazed the rotor. Makes a world of difference.

GB :mrgreen:

 

[krukster86]

Also if you want extra cleanliness, take apart the caliper as well. When the piston was removed on mine, I found more of the aforementioned sludge built up in there :shock:

 

[Bird76Mojo]

Also if you want extra cleanliness, take apart the caliper as well. When the piston was removed on mine, I found more of the aforementioned sludge built up in there :shock:

You mean like this???
[attachment=0:2t31ihyg]S5030404.JPG[/attachment:2t31ihyg]
:lol:


GB :mrgreen:

 

[leethal]

double wham

 

[krukster86]

double wham

AAAAAH! KILL IT WITH FIRE!!!

 

[Bird76Mojo]

double wham

AAAAAH! KILL IT WITH FIRE!!!

Plus a dose of penicillin. Be careful, it looks contagious.. :?


GB :lol:

 

[dwholler]

I own the CM400t and just wondering what complete master cylinder off ebay would be a direct replacement ? I am having a hard time finding it. Is there a universal one out there that matches up to the existing brake hose coming from the caliper?

thanks,
Dave

What's the verdict from those who've been here before? Clean and repair or just replace and get a new hose to match the new master cylinder?

Just get the new one off EBay - bolts right up, no muss no fuss, no leaks, works great.

 

[bryantjt]

The ninja 250 ones were cheap when I was looking to replace ours. They have a different fitting though so either an adaptor or new hose is needed. Z1 enterprises can probably hook you up with the fitting or hose, that is where I got our stainless braided one.

 

[Rich Ard]

Any 13 or 14mm master cylinder meant to mount on a 7/8" bar should do the job.

 

[dwholler]

thanks.. appreciate it. I found one.

 

[dwholler]

Just and update. This is the one i got off ebay this seller seems to relist them regularly.

http://www.ebay.com/itm/110870275284?ss ... 1497.l2649

it bolted right up and works great.