Any alternate front master cylinder?

Post Reply
porschekz
New Member & Happy To Be Here
New Member & Happy To Be Here
Posts: 21
Joined: Sat Dec 26, 2015 6:35 pm
Location: Madrid, Spain
Location: Madrid, Spain

Any alternate front master cylinder?

Post by porschekz »

Hi gents,
Yesterday I drow more than 600km of funny mountain roads with my 80' CBX at a ver high ritm. All my mates drown modern bikes such as Bmw, Triumph, ...It was really fantastic but..... I arrived so tired due to the wood feel of my front brake master cylinder. I have metallic lines, new caliper and master cylinder seals, and new brembo blue pads. I bleeded quite well my lines but the final lever feel is still with a wooden soft taste.

I also own other classic bikes (Kz 1000, KZ650, KZ 400, ....) with a brake effectiveness not so effective as in modern bikes, but at least the front brake lever taste is so strong.

Does have any other alternate front brake master cylinder with a modern brake lever feel, fully compatible with the rest of my original low handlebar set?

Does you have any good references of such alternate front master cylinder?

Regards, Juan

User avatar
desertrefugee
ICOA Member
ICOA Member
Posts: 177
Joined: Fri Mar 16, 2018 1:50 pm
Location: Chandler, AZ
Location: Chandler, AZ

Re: Any alternate front master cylinder?

Post by desertrefugee »

There are probably a couple of dozen alternates - but you'd want to match the bore size to the dual single calipers for proper fluid displacement. I'm not a long-time CBX owner, but fluids are fluids. I'd estimate that a 14mm master would be about right. Please wait for a member who's "been there/done that" to confirm.

With that said, you may just need a good bleed to get the "feel" where you want it to be. Nothing really wrong with a properly sorted 40 year old Honda OEM master. The real work is done down at the wheel.
'86 VMax, ‘83 ZN1300-6, ‘78 GL1000, '75 750K

"The older I get, the more I understand. Don't let the fear of what could happen make nothing happen." - Anonymous

steve murdoch icoa #5322
ICOA Member
ICOA Member
Posts: 4058
Joined: Tue Mar 04, 2003 9:12 am
Location: St. Catharines, On. Canada
Location: St. Catharines, On. Canada

Re: Any alternate front master cylinder?

Post by steve murdoch icoa #5322 »

Sounds like a fun ride.
I think you would be better off upgrading the calipers instead of the master cylinder.
Have a read through this thread for some ideas. viewtopic.php?f=6&t=9159

User avatar
FalldownPhil
ICOA Member
ICOA Member
Posts: 925
Joined: Fri Feb 10, 2006 11:25 pm
Location: Marina Del Rey, CA. USA
Contact:

Re: Any alternate front master cylinder?

Post by FalldownPhil »

A later, radial type master cylinder with the correct bore size will cure your troubles.
Here is a link to an old thread here that is worth a good read.
viewtopic.php?f=6&t=9159&hilit=radial&start=30#p74626
Best,
Phil
When you are up to your ass in alligators it is sometimes difficult
to remember that your objective was to drain the swamp !!

Artie
ICOA Member
ICOA Member
Posts: 170
Joined: Tue Oct 15, 2013 4:35 pm
Location: Medford Ma
Location: Medford Ma

Re: Any alternate front master cylinder?

Post by Artie »

A Kawasaki C-14 master cylinder will give you 2 finger stoppy powerful front brakes
I bought one on eBay for about $90
Best easiest mod going bolts on but also need universal mirror perch about $10 eBay also
Dig in forums others have done the same

rupsus
New Member & Happy To Be Here
New Member & Happy To Be Here
Posts: 12
Joined: Wed Aug 22, 2018 3:38 am
Location: the Netherlands
Location: the Netherlands

Re: Any alternate front master cylinder?

Post by rupsus »

I spoke to another cbx diver last week and he mounted a replacement pump from David Silver (only 35euro's) with much better performance compared to the original pump

User avatar
cross
ICOA Member
ICOA Member
Posts: 869
Joined: Tue Jan 21, 2014 11:26 am
Location: San Diego
Location: San Diego, Ca

Re: Any alternate front master cylinder?

Post by cross »

Once i changed my brake lines to steel braided my front brake lever feels wooden and hard as well. It brakes fine it's just that hard wooden feel!

Sasha
Sasha

'82 Honda CBX
'99 Triumph TBS
'01 Honda Valkyrie

:auto-sportbike:

Post Reply

Return to “BRAKES: Calipers, Pads, Lines, Rotors, Upgrades & Fixes”