The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: jamestnewsonr65 on August 10, 2014, 01:31:06 PM

Title: Rebuilding ate calipers
Post by: jamestnewsonr65 on August 10, 2014, 01:31:06 PM

So as one of the last jobs I need to do before getting the bike back on the road, I started to dismantle the callipers today.

I've got the ate versions on my 83 65ls, and had a little trouble with the pistons. Turns out using 2 bleed nipples and a bike pump gives you enough pressure to push the pistons out.

Once I got the out I realised that I need to replace these too along with the seals etc. I'm also going to get them vapour blasted the same as my forks, but it looks like there are only a couple of places listing the pistons.

They are pretty expensive to replace all 4 and wondered if anyone had any suggestions on where to look god replacements other than motobins and motorworks.

Also when figuring out which size pistons they are is it the diameter of them? If so mine are the 36mm I think.

Thanks.

Title: Re: Rebuilding ate calipers
Post by: Bob_Roller on August 10, 2014, 01:45:33 PM

You don't have many options for replacement pistons for the ATE calipers .

The pistons are 36 mm in diameter for the ATE calipers .

If the pistons prove to be too costly to replace, Brembo calipers  from an R65 will work and the replacement parts are available and less costly than ATE parts .

Rebuilding the ATE calipers on my '81 R65 is a job I am going to do when the weather cools down in 2 months here in the suburb of hell, I call home .

I've got a set of Brembo calipers off of my parts bike, '84 LS, I'm going to disassemble both sets and see if the Brembo pistons will work in an ATE caliper, I know the dust covers on the pistons are different between the two different calipers, so I don't know if they will work  or not .

Title: Re: Rebuilding ate calipers
Post by: arvo92 on August 10, 2014, 03:38:10 PM

This link has been shared here before but luckily it is already in my "google mind" and I can find it fast.

http://www.etypeparts.com/products/ate15-bmw1

I do not know anybody who has given feedback on these but the diameter is right so they should be fine. And they are stainless steel compared to rusty NOT trusty Ate originals which were chromed.

They are a cheap alternative and you should try them out. Much, much cheaper than alternative offers. I went for Motorworks offer and it took 1,5 months to get them plus constant calling them and asking why nothing is getting done. The most troublesome parts to get in my experience.

Title: Re: Rebuilding ate calipers
Post by: jamestnewsonr65 on August 10, 2014, 04:41:55 PM

Thanks, I might give those a try as they look custom made.

If I do go with these I will feedback on what they are like.

Cheers.

Title: Re: Rebuilding ate calipers
Post by: jamestnewsonr65 on August 17, 2014, 01:04:20 PM

I ended up ordering some of these pistons at about half the price of those from sources here in the uk.

Will let you know how they are when they arrive this week.

Title: Re: Rebuilding ate calipers
Post by: Bob_Roller on August 17, 2014, 01:15:26 PM

You ordered the pistons from the US supplier ???

How costly were the shipping charges ??