NC35 master cylinder

[chuchu20]

Hey guys just wanted to see would it be better to rebuild the master cylinder of a nc35 or replace it with something like a cbr600 master cylinder.

There seems to be air in mine and just cant get the brake pressure high enough.

Anyone know what M/C would fit.

[Cammo]

The standard master cylinders can be a pain to bleed sometimes. Air can get trapped in the highest part of the system (the bolt that holds the brake lines onto the m/c) and it can be difficult to get it all out by bleeding it in the traditional way.

Try bleeding the master cylinder before finding a replacement.

You can do this by pumping the lever several times to build pressure and holding it in, then crack the bolt on the m/c - sometimes you can see the air bubbles in the brake fluid that comes out - nip the bolt back up and release the brake lever. Repeat a few times. Messy job - tie a rag around the m/c, bolt, etc!

Buying a bleed bolt with a nipple is a less messy way to go about this: http://www.ebay.com.au/itm/HRC-DOUBLE-B ... 1290wt_956

There are also other things to try if that doesn't make it better, but best to start with this.

[chuchu20]

Thanks for that. Ive rebuild the caliper and have brought parts to overhaul the mc. Might as well over haul that and then bleed it.

Hope it all works.

[chuchu20]

The standard master cylinders can be a pain to bleed sometimes. Air can get trapped in the highest part of the system (the bolt that holds the brake lines onto the m/c) and it can be difficult to get it all out by bleeding it in the traditional way.

Try bleeding the master cylinder before finding a replacement.

You can do this by pumping the lever several times to build pressure and holding it in, then crack the bolt on the m/c - sometimes you can see the air bubbles in the brake fluid that comes out - nip the bolt back up and release the brake lever. Repeat a few times. Messy job - tie a rag around the m/c, bolt, etc!

Buying a bleed bolt with a nipple is a less messy way to go about this: http://www.ebay.com.au/itm/HRC-DOUBLE-B ... 1290wt_956

There are also other things to try if that doesn't make it better, but best to start with this.

Is that link that you posted a banjo bolt that is setup for a race brakeline setup?

[Cammo]

Yes, it's for running two lines from the m/c, one to each calliper.

If you still have the standard lines or a single aftermarket line at the m/c then it won't suit.

[chuchu20]

So if I brought hel lines in a race setup should be sweet then?

[Cammo]

I'd imagine so, as long as it uses two single lines from the m/c then all brands will fit.

I've bled master cylinders with and without the hrc bleeding bolt - the standard bolt is just a bit messier, no big fuss if you take the proper precautions.

[amorti]

If you're going to swap, you need to get one with 14mm bore.

[chuchu20]

What would happen if i put the mc of a cbr600 f4i onto an nc35 with standard calipers?