Haase Mizar Brake Question

Walter Kaihatu · Joined: 28 Mar 2011 Posts: 41

Hi,

Hope someone on the forum is a Haase expert who can give me some direction.

We have a Haase Mizar 30mm chassis and need to rebuilt the master cylinder and caliper. The chassis is either a '04 or '02.

1. Was told that OTK used to make Haase but that this chassis while similar was made by another factory.

2. The master cylinders (there are 2) are like the older OTK master cylinders without the reservoir and use a push rod to operate like an OTK. The master cylinders says "Haase" and have CIK numbers on them. They are gold in color.

3. The caliper says: "Runner" and is gold also.

***I can email or text you pictures of the brake system if that will help you identify what I've got here.

I either need:

1. Master and caliper rebuild kit. Or if you know if these components are the same as say an early OTK or CRG or TopKart brake system I would appreciate the information so I can buy the kits under a different brand.

2. Has anyone replaced a master cylinder and caliper with an after market Righetti system and are they straightforward to mount?

3. Do you know of any US based Haase importer or dealers that would have parts for an early 2000's Mizar in stock?

Thank you for any help on this. If you want pictures to see what I'm dealing with please email me at wkaihatu(AT)yahoo.com

Best regards,

Walter

Brian Degulis · Posted: Mon Jan 28, 2013 4:47 am Post subject:

You can probably by pass the whole ID and part search I have done many just matching up the seals and going to a seal distributor. That's normally easier and much cheaper. In my area it's FL seal and rubber.

Brian

Tyson Henry · Posted: Mon Jan 28, 2013 6:56 am Post subject: Re: Haase Mizar Brake Question

Brian Degulis · Posted: Mon Jan 28, 2013 8:55 am Post subject:

Good advice!!! We have a Birell Cadet that we bought in pieces. The caliper could not be rebuilt because the fluid was contaminated with water and the bore was badly coroded. $500 for a new Birell caliper. $210 for MCP kit with caliper and master. A simple re drill to adapt the master and an aluminum plate to adapt the caliper. Done deal works great and parts are readily available and not expensive.

Brian

Walter Kaihatu · Joined: 28 Mar 2011 Posts: 41

Thank you guys. Great advice.

I went on the "Haase.it" factory website and they offer the rebuild kit for the master and caliper...the problem is trying to find a Haase dealer/importer for the US. I'll post something on the general discussion site.

I was able to use OTK master cylinder piston seals and they seem to work but the rear caliper (it only has a rear caliper) is leaking so needs a reseal. Hoping that a reseal will get this kart back on the track for an affordable/small investment!

Best regards,

Walter

Brian Mead · Posted: Tue Jan 29, 2013 5:41 pm Post subject:

http://www.mikedotyracing.com/products.php

Plus are the Velgut's still working with them? National kart supply in Wis.

Brian Mead · Posted: Tue Jan 29, 2013 6:10 pm Post subject:

Sorry bout that. Hadn't read the other forum.

Walt Gifford · Posted: Sat Feb 02, 2013 11:30 am Post subject:

Wasn't Haase made by Tonykart? What's the caliper seal look like? Is it a cup or O-ring, try Napa or McMaster Carr. You want Buna-N rubber for dot 3.

Gif Cool

_________________
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Freddy Sandoval · Posted: Thu Apr 04, 2013 6:49 pm Post subject: Haase Mizar Brake Question

I have repaired many calipers and master cylinders, and know Haase chassis very well.

We used to have one just like yours

Brake loose ( loosen up ) both brake hoses from calipers
Take the rear calipers apart
Split the halves
Remove brake pads and bolts, or slider safety pins
Remove both brake hoses from calipers, so that there is an empty hole
Blow compressed air through the hole
(please make sure you aim straight to the floor or work bench )
Put a shop rag folded up to cussion the impact and protect the piston

Please note that your air blower has a pionty rubber tip
DO NOT PUT YOUR FINGERS UNDER THE PISTON

Anyhow, when you're done removing all components
If your cylinders are ok and not too pitted
Hone the calipers, clean all residue, take one cylinder cup/ seal
Go to your local auto parts store
Tell them you need a rear wheel cylinder rebuild kit for a mid 90's chevy truck ( Don't remember if it's 1/2 ton or not )
But the diameter should be about 1 to 1/2 inches

Lube everything up with assebly fluid or brake fluid
Reverse procedure, bleed system

And go play.

Good luck, FastFreddy
Wink

Chris Parks · Posted: Fri Apr 05, 2013 4:45 pm Post subject:

It is always better to repair and not replace a corroded cylinder. This can be done by putting a stainless steel sleeve in it and the problem will never return and that cylinder fits the kart. I have never bought a genuine brake seal of any type, the brake store always matches the old one.
_________________
understeer happens on road courses and usually is pronounced with a British accent. Push happens on ovals and usually is pronounced through a wad of chew. Other than that, I don't think there's a difference - Jim Derrig

Chris