Rear Brake

[Luke's 350r]

My rear brake caliper does not float on the disc like it should. I tried taking the parts that slide back and forth apart to get new, but they are frozen in there. Any ideas on how to take this apart.....:confused:
Thanks
Oh..it is on an 85 atc 250r

[Technogeek]

1. take the caliper of the trike and remove the brake line and pads if possible

2 make an attachment that you can connect to a compressor blowgun to the brake line connection on the claliper and fit it.

3. wrap the caliper in of rags and put into a enclosed box with the air gun connected bit operartional form outside the box and blast away.

then the piston should come out and be careful cause residue brake fluid can spurt out and it is poisnous and corrosive, thats why you wrap it in rags. you are best of to use the box method even though it is not vital cause any parts that are poped out with the air can go any where and you could hurt something or lose a part.:thumbsup:

[Luke's 350r]

Thanks Technogeek,
I have that part figured out. Sorry I didn't explain it better. I'm talking about the little soft rubber bushing and fittings. When the caliper is mounted these allow the caliper itself to move side to side. These parts are frozen up and it doesn't allow the caliper move so I'm getting a lot of drag in my brake. I need to get these parts out not the actual pistons. If I new what the parts were actually called it would probably help you guys understand what I'm talking about.
Thanks

[Mr. Richard]

hey luke!!! hows it going ,,, just bring it to me i'll get them out for you,,,,,,,,,,, they are a real pain in the butt ,,i have 6 calipers most are junk from the same problem... i'll get them out one way or another!!!!:eek::rolleyes::eek::rolleyes::eek::rolleyes::eek:

[ATCnut]

Bummer dude. I had the same problem with my 350X, and here is what I had to do.
There are two pins, a big diamater upper one (called the slide pin) and a small diamater lower one (called the pin bolt). The small one is inside a rubber grommet and should not be stuck.

What I had to do is take the caliper and bracket off the trike, I could then get the pin bolt loose and out of the way. Then I was able to rotate the bracket and unscrew it from the slide pin.

The slide pin is the problem. It has a allen head, and is supposed to come out through the caliper. It is a steel pin, that is inside a thin stainless (?) steel sleeve in the aluminum caliper. The pin rusts to the sleeve, and is stuck. I ground the head of the slide pin into a hex so I could put a box end wrench on it. With the caliper in the vice, I was finallly able to get it to turn and come out. The sleeve was stuck to it. I was able to get the sleeve off of the pin, clean everything up, and put it back together with a new slide pin.

I read about someone drilling out the caliper and putting a brass bushing in, but never seen it done.

This was a bitch of a job. I was so pissed before I was done my caliper has all new everything in it, and is maintained religiously. I never want to have to do that repair again.

[jenndnn3]

Gee talk about complicated....I used a hammer and a same size socket and tapped it out...was able to reuse everything except the rubber. Oh yeah i forgot it did take 2 days of tapping..

[ATCnut]

:doh: Guess you are better than me Jen LOL

[Luke\'s 350r]

ATCnut,
That kind of sounds complicated. I have to look at a microfiche so I can get a better idea on how this thing works and what kind of pieces are involved. After that I'm sure I will understand a little bit better of what ATCnut is talking about. jenndnn3 I like the idea of just beating the crap out of it. :)
Kasey I might just take you up on that offer.
Thanks

[jenndnn3]

Originally posted by Luke\'s 350r
jenndnn3 I like the idea of just beating the crap out of it. :)



I said TAP.....LOL not beat....but then that works too...Also do you know bikebandit.com has microfiche up on the net to look at.

[Luke\'s 350r]

Thanks for the website Jenndnn3 I will check this out. I figured you didn't mean that. :)

[ATCnut]

Thinking obout this reminded me what the problem was. I tried to loosten the slide pin with the allen, and trashed the hole. Don't try to turn the allen, just take the caliper and bracket off in one piece, then after the pin bolt is removed, you can unscrew the bracket from the slide pin. Then you can do the tapa tapa thing like Jenn discribed.

[Unregistered]

i,ve had to drill some out also. back together with lots of never seize.

[Mr. Richard]

never sieze on the threads!! yes grease on the slide pins

neversieze is

[Mr. Richard]

never sieze on the threads!! yes grease on the slide pins

neversieze is NOT a lubricant it is a anti oxidizing compound
designed to fight corrosion, when you have pieces that have to move use a good grade moly grease thats what is was designed for too,,,,,,,,,,,,,,,

[Luke's 350r]

Thanks guys. I'm going to work on it today. I'll let you know what happens. Hey Kasey do you have any rear break calipers laying around that are in ok shape. Mines pretty trashed. Also do you have any extra brackets for the 86 model laying around. Dave at mp racing is going to build my swingarm to take the 86 model braket not the 85. He did this on his 85, the 86 brake caliper holder still slides over the 85 carrier so all I need is that peice and the actual piece that bolts up from that to the caliper. If you have some of these pieces laying around maybe we could do some trading. I have some chrome footpegs, brake res. guard, and shifter that I'm not using.
Just a thought

[Mr. Richard]

sorry luke the only 86 stuff i got is on the 86 ,,,,,,,,,,,,,, no spare parts yet ,,,,,, i'm workin on that thooo

[Luke's 350r]

Thanks Kasey