Making Progress...

What am I looking at?! L-R: Cylinder, Piston, Wrist pin, Connecting Rod

I finally got a large enough block of time to install the newly worked piston, cylinders and heads onto the salt bike…

My very own "Altar to the gods of Speed"...

Over $1000 worth of machine work and parts, ready to re-install!

Got the pistons back after de-carboning, with new rings and scrubbers. And the cylinders have been cleaned up and re-honed, and of course the heads have been rebuilt.
You can see in the photo above the parts are divided between the right and left sides of the engine, so I can keep track of what goes where on install, and to make sure I'm not missing anything.
Now? I've just got to get it all back together and see if she'll run!

Here's a cut-away of a BMW "airhead" engine, showing where a lot of the stuff currently on my bench goes...

R65 Heads update...

The heads just came back from Peter Bombar, all clean and spiffy, and holding perfect vacuum:

Refurbed head from the R65 - ready to install

These absolutely look great, and hold perfect vacuum. Ready to rock n' roll!

Carb Rebuild Time-lapse Video

I felt proficient enough after rebuilding the right side carburetor, I filmed the cleaning and rebuild of the left side, and set it to some clockwork-type music...

Bing Carbs, Part 2

We put it all back together - after disassembling and cleaning the enrichener circuit, that is...photos after the break:

Bing Carbs, Part 1

I started the carb rebuild on the Type 64-3 Bing carburetors on the R65. No hiccups so far, here's a few pics after the break:

Gosh Darn It!

Ok, not the words I've really been using...

Rare, "unobtanium" right ATE caliper on the BMW R65

I performed, or I should say, started, the rebuild of the 2 ATE calipers on my '81 R65. The right side, which was the side that was frozen up, came off and came apart with little resistance. After hours (literally) of scrubbing and cleaning, I had a very clean and serviceable caliper that took the rebuild bits – along with the little o-rings from Mike V– just fine. There was some pitting on the pucks, but these were above the seal line so I dressed 'em up and reinstalled. All's well says I.
Then came the LEFT side. I was stymied in minutes. The 2 bolts mounting the caliper to the fork leg loosened just fine by hand, and the top 8mm hexbolt holding the caliper halves together broke loose too.
But the lower bolt was another story. I was initially being careful, as it looked a little rounded by a previous owner, but no amount of pressure using a breaker bar would pry it loose. Hours of liquid wrench, PB blaster, and heat from a propane torch only yielded a severely buggered head. As this head is the one that stands proud, I even tried locking it in a vise and rotating the caliper around it. No joy.
I'm ashamed I let it degrade this far, but it ticked me off that bolt wouldn't give up.
I really think some previous owner musta JB Welded that bolt in there.
Sigh.
In defeat, I'm off to Bombar's Beemers tomorrow to see if it can be tapped out. I need the leprechauns on my side for this one.
What follows are photos of the successful rebuild of the RIGHT caliper: