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Old 10-07-2013, 09:10 PM
Adrenaline Junky Adrenaline Junky is offline
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Default New cart for me (well my kids)

Hi everyone,

Been cruising this site for ideas and have gathered most of the info I need to complete my build.

I picked this up at a garage sale for $5.
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We are converting from electric to gas and have purchased a Predator 212 from HF. We also picked up a sprocket, chain and clutch. Going to extend the frame 8 inches. My stock rotor looks like this:
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I'm wanting to convert from mechanical to hydraulic. I've found these complete brake systems. I'm just not sure if they will work with my rotor setup (knowing I'll have to fab it all up)

This one comes with a rotor, steel braided lines and remote reservoir.http://scooterpartsunlimited.com/ind...5cc-150cc.html

Another without the rotor or reservoir. Although master looks like it will need to be mounted vertical.
http://="http://www.ebay.com/itm/ATV...t_3319wt_1082"

Any thoughts on whether these will work with my existing rotor? Any other options you knowledgable folks might have?

Thanks,
Mike
  #2  
Old 10-07-2013, 10:27 PM
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Best $5 ever spent!

You might find the mechanical caliper works quite well, I'd give it a try before replacing it.
  #3  
Old 10-08-2013, 07:30 AM
Adrenaline Junky Adrenaline Junky is offline
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It's a mess. Allen heads were frozen. Couldn't get it to work properly. Pretty much lost interest in it. Besides I think the hydraulic brakes are safer.

I have read many threads talking about a "floating" rotor, but those were mainly with mechanical brakes. It looks like the hydraulic caliper will be hard mounted. That being the case, do the pads self align on the rotor when the brake is applied? Seems like it would have to be dual piston to clamp properly. I can't tell if the calipers I found will clamp with both sides or just one side of the caliper will move.

Anyone own these that can help me out?

Thanks for the response,
Mike
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Old 10-08-2013, 07:23 PM
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If it's a single piston caliper either the caliper or the rotor has to float. Usually easier for the rotor to float.
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Old 10-08-2013, 08:56 PM
Adrenaline Junky Adrenaline Junky is offline
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I'm having a hard time getting a response from the sellers. As a rule of thumb do all dual piston calipers have 2 bleeders?
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Old 10-08-2013, 09:10 PM
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no. NOT ALL.
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Old 10-08-2013, 09:24 PM
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i would go back to the mechanical caliper ebay got it for $20
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Old 10-08-2013, 09:25 PM
the..gokart..god the..gokart..god is offline
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that caliper looks just like the ones on a pocket bike.
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Old 10-08-2013, 09:26 PM
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what kind of engine you useing ?
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Old 10-09-2013, 05:22 AM
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Quote:
Originally Posted by Adrenaline Junky View Post
It's a mess. Allen heads were frozen. Couldn't get it to work properly. Pretty much lost interest in it. Besides I think the hydraulic brakes are safer.

I have read many threads talking about a "floating" rotor, but those were mainly with mechanical brakes. It looks like the hydraulic caliper will be hard mounted. That being the case, do the pads self align on the rotor when the brake is applied? Seems like it would have to be dual piston to clamp properly. I can't tell if the calipers I found will clamp with both sides or just one side of the caliper will move.

Anyone own these that can help me out?

Thanks for the response,
Mike
I don't know if there's too much sense in trying to get all that sorted out before you actually purchase a brake system, but if it helps, here's some info for you:

Single acting disk brake systems are such: The caliper applies braking pressure from one side only. From there, something must float in order to equalize braking pressure on both sides of the rotor. In some cases, the caliper is fixed and the rotor floats. When braking, the caliper applies pressure from one side. This squeezes the floating rotor into contact with the fixed inboard pad. If the rotor could not float, the brake would be rendered near completely ineffective.

A more common methodology behind single-acting disk brakes, is the floating caliper. The rotor is fixed in position, and the caliper floats. It is designed and mounted in such a way as to let the caliper slide side-to-side on it's bracketry. When the brakes are applied, the caliper begins to apply pressure against one side of the rotor. Once the pad begins to make firm contact- and since the rotor cannot move- the caliper's own force against the rotor causes the caliper to push away from the contacting side of the rotor, bringing the opposing side into contact. This equalizes the pressure from both sides. If the caliper were to freeze on it's slides and be rendered unable to move, braking would be rendered nearly ineffective.

With a double-acting caliper, the caliper is capable of applying pressure from BOTH sides evenly, and both the caliper and rotor maintain a fixed position. As far as the hydraulics are concerned, it depends on the type of caliper itself. Some have internal passages that make for only one fluid inlet and one bleeder screw, while others are plumbed seperately.
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  #11  
Old 01-15-2014, 06:33 PM
Adrenaline Junky Adrenaline Junky is offline
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Thought I would add an update to a great father and son project.

We stripped it down to the frame
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Taught the kido how to use the air tools.
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Stretched the frame 7 inches
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Mocked up the motor
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Sanded the frame
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Painted the beast
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Attached the parts
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Reworked pedal assembly
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Disc brake mount
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New caliper mount
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  #12  
Old 01-15-2014, 06:43 PM
Adrenaline Junky Adrenaline Junky is offline
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Fabbed up some skid plates for the chain and rotor
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Finished poduct
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It took us about 6 weeks on the weekends here and there. We have about $250 into the conversion from electric to gas. That included a new motor, clutch, 60 tooth sprocket, chain, disc brake assembly and paint. If you didn't notice, we used his old car seat from the attic. This HF motor starts first pull every time and runs like a champ. Parking lot sale $90.

I cannot tell you how many hours of fun ALL the kids in the neighborhood have had on this thing. The biggest reward is seeing the grin on my sons face every time he flies by.
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  #13  
Old 01-15-2014, 06:44 PM
Poboy kartman Poboy kartman is offline
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Nice. Welcome to the forum and please fill out your profile so we know where you are. .....
  #14  
Old 01-15-2014, 07:29 PM
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Nice work

Just one thing, LOSE THE SEATBELT! If it rolls, the belt will trap him under the kart; without the belt, he'll be thrown out...
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  #15  
Old 01-15-2014, 11:20 PM
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Nice. UI agree with the seatbelt. They are only recommended with a rollcage
  #16  
Old 01-16-2014, 06:13 AM
Adrenaline Junky Adrenaline Junky is offline
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Great point about the seatbelt! Thank you. It will be gone tonight!!
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