SOHC.co.uk Forums > CB350/400

Brake Caliper Siezed?

(1/5) > >>

Drew400:
Hi all,

I'm aware of horror stories about 400/4 brake calipers and so I'm expecting plenty of expertise on this forum (as usual)!

I haven't yet much effort into this part of the restoration. However, having refitted all the brake parts and bled the system, I'm left with a spongy lever action (that doesn't appear to do much at the disc end) and a front wheel that I can move in a rearward direction (as long as I put some effort in) but that won't budge in a forward direction.

It was all working fine when I stripped the bike down. However, since then I have replaced the hoses and unions (and of course the fluid!).

Any thoughts before I embark on a proper investigation in my garage?

Thank you,

D.

Johnwebley:
I assume the 400 caliper is the same,or similar to the 500 caliper,

 I found a strip down,and new seal fitted,remember to clean the groove works wonders,

 over time the seal hardens,it is designed to flex,which is how it retracts the piston,for about £3 ,its well worth changing

UK Pete:
Try pumping the fluid in with a syringe from the bleed nipple, it usually does the trick
pete

Drew400:
Thanks both,

I've changed the rubbers on car calipers before now, but not on a bike. Shouldn't be too difficult... famous last words?

Before then, I feel the purchase of a syringe on the horizon.

Cheers,

D.

tom400f:
So you didn't take the caliper apart, Drew, remove the piston and such? That's a must on these bikes as they can get corroded.

What about the master cylinder? Does it move freely? Mine was gummed up

http://www.sohc.co.uk/index.php/topic,2367.msg22231.html
http://www.sohc.co.uk/index.php/topic,4812.msg22283.html#msg22283

Navigation

[0] Message Index

[#] Next page