ATC 250R/350X New Rear Master Cylinder's

[arlaunch]

http://www.ebay.com/itm/NEW-ATC250R-1985-1986-REAR-BRAKE-MASTER-CYLINDER-ATC-250R-250-SHIPS-WORLDWIDE-/311530820139?hash=item4888af122b:g:QSQAAOSwGotWn8c s&vxp=mtr

http://www.ebay.com/itm/NEW-ATC350X-REAR-BRAKE-MASTER-CYLINDER-ATC-350X-350-1985-1986-SHIPS-WORLDWIDE-/311530821164?hash=item4888af162c:g:rpIAAOSwUV9Wn8J T&vxp=mtr

This fella sells the RMC's for the Gen 2 and Gen 3 R's.

Thats cool!

He also has stuff for the X's.

I bought a rear brake caliper for my 200x from this fella.

I have yet to install it as a new addition to my family has halted all ATC build progress.

[pismorat]

Old thread, but has anyone purchased and run one of these? My '85 R has a pretty scratched bore on the master cylinder and it's tough to find a housing. I did a seal rebuild, but it leaked after a while again and I'm tired of brake fluid leaking everywhere. Any thoughts on fixing what I have?

[Dirtcrasher]

Bryan Ditch had one on his 350X, the piston broke off the shaft that pushes on it. He said that was the 2nd time a rear caliper has failed.

I wouldn't use the junk, It's your brakes.

I'd adapt something new if rebuild parts and cores are unavailable...

[Shawn Powell]

my factory one leaked when I bought my trike . Bought a Chinese repro , never got good pressure. Bled it. Rebuilt my caliper. Still no good. Bought a shindy rebuild kit for my OEM one (luckily I saved it) and one bleeding session later I have nice rear brakes. So I guess I’d suggest buying a used one and rebuild it if yours is junked. I’ve heard 450 and 400ex ones work with a little modification. No exp with that on my end.


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[pismorat]

I wonder if there is a way to hone the stock body to get the scratches out? The seals I put in a year ago are not ripped, but obviously the fluid is leaking past them in the grooves. The brakes still work good, I just have to keep the reservoir filled cause it keeps filling the boot and leaking on the floor.

[captainweezy]

For the 350x rear caliper I run a CR80 front. I have had it for at least 4 years with no issues. Around $30 on eBay. Bolts right up with no modifications.

[ironchop]

I wonder if there is a way to hone the stock body to get the scratches out? The seals I put in a year ago are not ripped, but obviously the fluid is leaking past them in the grooves. The brakes still work good, I just have to keep the reservoir filled cause it keeps filling the boot and leaking on the floor.I've heard of people honing them with very small ball hones they purchased somewhere online. I'm sure they would glaze up a little after all these years.

How deep are the scratches?

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