250SX rear brake upgrade,disc brake!!!!

**Stonewall** · 10-19-2011, 09:55 PM

What did that disc and caliper origionally belong to? I may try this on my 250ES.

**atc500x** · 10-20-2011, 07:44 AM

the disc is from a yamaha kodiak 450 2009

**big specht** · 10-20-2011, 08:47 AM

Any better pic ???

**atc500x** · 10-20-2011, 09:07 AM

No for the moment,all picture I have are on the forum,for the moment my 250sx need a good clean up after a SERIOUS mud bath (over the rack).If I remove the wheel for any reason I will take better picture

**Stonewall** · 10-20-2011, 09:24 AM

Cool, any chance you could put up some pictrues of the front disc setup?

**schneed** · 10-20-2011, 12:47 PM

I posted these pics on another thread (http://www.3wheelerworld.com/showthr...28#post1060228), but here is a pic of the rear discs brakes my buddies and I all have.

Click image for larger version.

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We did a different design, than atc500x did, but similar in the end.

Depending on interest, could sell some kind of kit!

We went to the local atv salvage yard and just picked whatever we could find for disc brakes and levers on old 4 wheelers (prices vary on condition).

**big specht** · 10-20-2011, 01:03 PM

Why on the other side??? and hoo does it stop with the single piston caliper??

**atctim** · 10-20-2011, 01:18 PM

Outstanding Idea. I know it has been talked about several times in my group of 3 wheeling buddies to do this mod, but this is the first I've seen it. Way to think outside of the box. My issue was alway, how do I mount the disc to the axle. Your idea of back extending the hub for the mount is MINT!!!!! Kudos. I may have to do this on my rider 250ES. Again - Outstanding work / idea. You da man!

**atc350xer** · 10-20-2011, 01:57 PM

Originally Posted by atctim

Outstanding Idea. I know it has been talked about several times in my group of 3 wheeling buddies to do this mod, but this is the first I've seen it. Way to think outside of the box. My issue was alway, how do I mount the disc to the axle. Your idea of back extending the hub for the mount is MINT!!!!! Kudos. I may have to do this on my rider 250ES. Again - Outstanding work / idea. You da man!

If you're considering making the parts, Tim - if you make a coupla extra, I'll buy 'em!

**schneed** · 10-20-2011, 02:30 PM

Originally Posted by big specht

Why on the other side??? and how does it stop with the single piston caliper??

Well, I put the disc brake on the opposite side of the drum brake, b/c on my '86 BR, the drum brake is sealed around the axle and tough to just remove (unlike the '85 BRs).

It seem to stop just fine with the single piston.

Some said that they like the drum brakes better for mud, but we ride in as much mud and swamps as possible and the disc brakes are far superior to the drum. I would say that until you have tried both, you don't know what you are missing!

**Mondexbrute** · 10-20-2011, 09:34 PM

atc500x I need this set up so bad for my Big Red! Please find the time to build a few kits, I will pay top dollar for this setup!

**schneed** · 10-21-2011, 11:32 AM

Originally Posted by Mondexbrute

atc500x I need this set up so bad for my Big Red! Please find the time to build a few kits, I will pay top dollar for this setup!

Mondexbrute, I thought you sold your Big Red?

**big specht** · 10-24-2011, 08:58 AM

Who ever makes a kit will be able to sell them.

**atc500x** · 10-24-2011, 12:32 PM

The problem is also a price
example,if I bought all parts,used to built a kit,including price of shipping of these parts to my house + the labor at 30$ /hour on my working hour since it's my job,

rear hub with disc 90$
master cylinder + hose and caliper 150$
used backplate 40$
labor 8 @ 30$/hour 240$

total 520$
+ shipping

Now sure every body will buy a kit for 520$ + shipping.......

Wasn't a problem for me,all parts was stock when I built it,but now all parts need to be ordered

**schneed** · 10-24-2011, 03:24 PM

I agree with atc500x...the cost gets kinda high, but...

I think we paid around $120 for caliper, disc, handle lever and reservoir and line off of any random atv we could find at the salvage yard.

The other parts we used were laying around the shop:

approx 4" dia pipe, 1/4" thick used to weld to the axle/hub that the disc was welded too
random angle iron for custom brackets

So maybe $150-200 parts and about 3-4 hours in labor, but most of that labor was installing, so labor hours wouldn't be high.

Thing is, I doubt any of us what to go back the salvage yard anytime soon, as its not close and it's getting cold here in MN!

Maybe next spring! Or I can put up some detailed photos of the build (post installation of course).

Thread: 250SX rear brake upgrade,disc brake!!!!

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