rear wheel and front brake problems

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Knoomper
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rear wheel and front brake problems

Post by Knoomper » Sun Jun 17, 2018 12:05 pm

Hi all,

So I'm having a bit of a problem with my front brakes and I'm having questions about my rear wheel.
The thing with my front brakes is that it took me 2 days of getting, as far as I know, all the air out the system.
When I pump the lever I see the piston moving in and out, but not far enough, so it's not actually braking. I read something about a seal in the calliper that, if the groove is not perfectly smooth, that it's actually the seal that pulls the piston back. Could this be it?
I tried pumping the piston out without the brake pads but it's just moving back and forth.
I also noticed some air bubbles near the circlip of the master cylinder. Could this be a leak, or is this normal? It is a new piston kit with seals and everything.

The other problem, or challenge, I have is fitting the rear wheel. It just feels like my wheel is too wide for the swingarm. It is a 34L swingarm with a 1VJ wheel. I do have 2 different chain tensioners for the right side. Also from a 34L and 1VJ. The one from the 1VJ does fit a bit better but I have to swing it with a hammer to get it in place right. This is all without a chain fitted, does it get easier with a chain? Or am I just destroying my axle?

I hope I'm making sense, and thanks in advance!

Knoomper

jibber
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Re: rear wheel and front brake problems

Post by jibber » Sun Jun 17, 2018 3:59 pm

Which sprocket carrier are you using? Iirc the 34L/55W carrier is narrower than the 1VJ.

Knoomper
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Re: rear wheel and front brake problems

Post by Knoomper » Sun Jun 17, 2018 5:30 pm

The sprocket carrier came with the wheel so I'm guessing it's from a 1VJ.

jibber
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Re: rear wheel and front brake problems

Post by jibber » Sun Jun 17, 2018 7:22 pm

Try the earlier carrier.

Knoomper
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Re: rear wheel and front brake problems

Post by Knoomper » Sun Jun 17, 2018 7:35 pm

I will. I already found one on eBay so I'm hoping to receive it this week.
Thanks for your help!

stevep10
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Re: rear wheel and front brake problems

Post by stevep10 » Sun Jun 17, 2018 8:30 pm

As to your problem with the front brakes, you will probably find that the dust seal, the smaller one at the front of the pair, is the culprit. They tend to roll over a little bit and pull the piston back more than it should. You could remove it completely and try it before buying a new seal set. I know it cured the same thing on many of my bikes in the past, especially Kawasaki's.

Knoomper
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Re: rear wheel and front brake problems

Post by Knoomper » Fri Jun 22, 2018 2:45 pm

@jibber Thanks again for your help! I received my sprocket carrier from Germany today and everything fits like a glove now.

@stevep10 I will try that. Just to be certain, you mean the dust seal in the caliper right? What is the best way to remove the piston, because I cannot pump it out, and I don't want to damage the piston as it is a new one.

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Re: rear wheel and front brake problems

Post by jibber » Sat Jun 23, 2018 1:19 pm

Grease gun or air

Knoomper
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Re: rear wheel and front brake problems

Post by Knoomper » Tue Jul 10, 2018 10:55 pm

I finally got it out with an air compressor. The piston is unharmed but it seems that the seals are somehow damaged. Part of rubber has broken/ripped off or something. Does anybody know where to get new seals? I can only find a new piston repair kit with seals included

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