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View Full Version : Let's talk about: Master Cylinders



Hatchet54
02-22-2013, 10:39 PM
Ever since I got my KZ I've been dreaming about redoing the entire front end, and one of the most prominent parts of that dream is of course, the controls. I want to get new bars, new grips, new mirrors, new levers, etc.

Every morning I wake up and ask myself, "why haven't I bought those new parts yet?" and then I remember. It's because of the f'ing master cylinder.

I'm talking of course about one of these stupid things (mine is not the one pictured, but you get the idea).

http://i.ebayimg.com/t/1982-KAWASAKI-KZ750M-KZ750-750-CSR-FRT-MASTER-CYLINDER-/00/$%28KGrHqR,!joE3NTgOG5UBOJuheyzyw~~_35.JPG

The brake lever and it's deformed twin.

I can't do jack until I figure out a solution to this piece of crap. I can't fit a mirror onto a new bar with it because it takes up too much space, and obviously I can't use my new brake lever.

Taking off the front brake is not an option. My rear brake is bad and I wouldn't trust it to stop a Playskool Cozy Coupe. And besides, I ride crazy and I need two brakes.

And I've seen the Triumph/Nissan/etc. reservoirs that they sell on DCC and other places. But I'm really not interested in paying $100 or more for a part like this. Sorry. That's approaching what I paid for the bike.

There has to be a solution to this. I could be wrong, but I'm pretty sure that I have not been seeing these bulky fugly ass things on everybody's builds round here. So what's the secret? All I want is to use a good old-fashioned alloy brake lever. Is that too much to ask?

I mean, there has to be something. Some sort of in-line application? I tell ya what I really WANT to do is mount the thing somewhere hidden on the back of my forks or such...like right next to the actual brake to keep it all localized...that would be preferable...but obviously I know very little about brakes so there's surely some reason I couldn't do this.

Somebody please throw me a bone, because I've got my new controls all lined up to order and I want to pull the frikking plug already.

Discuss. Sorry if this has been brought up before, but I did a search and found nada.

Revelator
02-23-2013, 12:47 PM
A couple of days ago I was screwing around, trying figure out a way to mount
the MC somewhere other than the handlebars, & mocked up a used MC I had lying
around & put it way down low on the front end, towards the rear. didn't look bad
until I tried to figure out a way to route the cable. every possible way I tried looked fugly,
& worse than the MC mounted to the bars. My front end is a girder, so the caliper is
mounted out front & the cable was sticking way out as it tried to snake around the rear
girder tube, finally gave up. But if you have conventional hydraulic forks, It would probably
look okay since you don't have to have slack in the cable since the calipers move with the
sliders. Another problem is getting the right mc so that the lever action works off a cable & that
the fluid reservoir is aimed upwards. actually a vinyl tube would probably work the best.

Hatchet54
02-24-2013, 12:56 PM
Well, I'm not against the idea of some fabrication. I'll go take a look at my setup today and see if I can do something along the lines of what you outlined. Thanks.

I'd still prefer something bolt-on, though, I think...I really hate this thing...

Acosi151
02-24-2013, 6:09 PM
This is one of the slickest setups I've seen that still runs a lever for the front brake. Uses the Nissin though.

http://www.chopcult.com/gallery/p.php?a=en52Znxmb3RleGpldmduVHF6eXV9eH5ndTc4L2hiYD lzfmNmZyYiMDsnNyY0LT8yOjo2JTI6LjYqPDEuJzc=

Old Gold Garage Virgin Killer from back in 2010 http://www.chopcult.com/news/articles/old-gold-garage-co-sportster.html

Blackbetty
02-25-2013, 10:35 AM
Man tough gig....

I like the remote MC tucked away using a cable driven lever at the bars. I wonder how the brake action feels though.....may not be too sensitive.

I was on the hunt for a super narrow MC to use on skinny bars, found this wilwood unit, it's only 7 inches long so it can fit:

https://farm8.staticflickr.com/7023/6851781913_d3418672d8_b.jpg

I run a 4 piston brembo caliper so I needed either a 13mm MC or a 1/2" (12.7mm). This willwood is 1/2" so it works well. I never got around to putting brakes back on so I never used it.

You could also use a remote reservoir MC and make a tiny reservoir out of clear tubing.

Make sure to match up your MC with whatever caliper you're using.

richfrazier
02-25-2013, 12:45 PM
ive used ones off of ebay from dirt bikes and ive had no problem. the one I used was off of a trx300 and I got it for like $20. if you are looking to do a remote mc id look at the rear mc off of a cr85.

ehester88
02-25-2013, 6:22 PM
ive used ones off of ebay from dirt bikes and ive had no problem. the one I used was off of a trx300 and I got it for like $20. if you are looking to do a remote mc id look at the rear mc off of a cr85.

yep.

Hatchet54
02-25-2013, 7:15 PM
good ideas, guys. I'm starting to get some options here.

What do you reckon the story is with these things?

http://www.ebay.com/itm/Universal-Motorcycle-Master-Cylinder-Fluid-oil-reservoir-front-brake-clutch-Tank-/281008142189?pt=Motorcycles_Parts_Accessories&fits=Model%3ATRX&hash=item416d63f76d&vxp=mtr

motorlou
02-25-2013, 8:46 PM
here's is my vid i did on a bike....................

http://www.youtube.com/watch?v=YVAA1FuEBOY

Blackbetty
02-26-2013, 8:46 AM
good ideas, guys. I'm starting to get some options here.

What do you reckon the story is with these things?

http://www.ebay.com/itm/Universal-Motorcycle-Master-Cylinder-Fluid-oil-reservoir-front-brake-clutch-Tank-/281008142189?pt=Motorcycles_Parts_Accessories&fits=Model%3ATRX&hash=item416d63f76d&vxp=mtr

Those are replacement remote reservoirs for sport bike type MCs...

http://www.j-mart.biz/j-parts/images/daytona/61740.jpg

Like I was saying, the remote reservoir MCs are nice bc you can get em smaller:

http://www.chopcult.com/forum/showthread.php?t=1285

ehester88
03-02-2013, 4:55 PM
This is what I'm workin with...

Hatchet54
03-02-2013, 8:59 PM
This is what I'm workin with...

Details?

Shacknasty
03-03-2013, 12:12 AM
http://www.chopcult.com/forum/showthread.php?t=1285&highlight=reservoir

Tito
03-03-2013, 11:47 AM
Here's the nissin I did on my old evo sporty. The clutch lever is a chopped down ninja with a custom made nina->sportster clutch cable by Barnett. I shaved and polished both of the levers and perches, got them off ebay before the prices went up. Watch out that you don't get a master that needs rebuilding unless it's really cheap. You can pay like 20-30 just for a rebuild kit, and the made so many different m/c's you have to make sure to get the right one. They also sell reproduction nissin masters for about 100, so that may be the best way to go.

If you frisco mount your tank, you can hide a remote m/c under the tunnel, operated by a regular lever. Fab Kevin makes a set-up, but it's pricy. The rear nissin m/c's that you would use for remote use are still dirt cheap.

The master on the lower fork leg right by the caliper is a cool trick, but can look horrible if you use the wrong pieces and don't put much though into it.

http://i737.photobucket.com/albums/xx11/vincentbignuts/Evo/SAM_1596.jpg

ehester88
03-03-2013, 3:44 PM
Its off of a mid 90's CR250 dirtbike. It needed a rebuild kit and the bore size is a little small for my sporty caliper but it does the job for now. I think its an 11mm bore and Ive got about $80 into it.

Blackbetty
03-05-2013, 11:11 AM
Dirtbike MCs are almost all universally 11mm.

Is your caliper a 2 or 4 piston?

It'll probably be way too soft if it's 4. I tried an 11mm Nissin off a CRF450R on a brembo 4 piston and the lever would nearly hit the bar.

It may work ok with a 2 piston caliper though, unless the original MC was a 5/8" (~16mm). In that case an 11mm isn't going to work for shit.

TraumaJunkie
03-05-2013, 2:42 PM
Using a trx300 mc with Shorty levers from hellhound racing on my sumotomo caliper, 10mm. Works great, looks awesome.

Got the mc, 2 levers, and a matching trx300 clutch perch on eBay for 50. No complaints.

ehester88
03-06-2013, 9:32 AM
Dirtbike MCs are almost all universally 11mm.

Is your caliper a 2 or 4 piston?

It'll probably be way too soft if it's 4. I tried an 11mm Nissin off a CRF450R on a brembo 4 piston and the lever would nearly hit the bar.

It may work ok with a 2 piston caliper though, unless the original MC was a 5/8" (~16mm). In that case an 11mm isn't going to work for shit.

I have a 4 piston caliper. Yea the 11mm is pretty spongy. I really wanted to run it i think it adds a nice touch but im gonna bump it up to 14mm