A few pictures of my dismantled R26 engine

[c.d.iesel]

what's the story with that DELORTO carburetor ?

somone looking for S=P=E=E=D= might explain
some about all that wear?

[808Airhead]

That is what happens when trying to rev it to 11k!!!

[eblen6882]

The engine with the Del Orto carb had the spun crank. It's number matches the number on my frame. This bike used to do some sort of racing out of Fort Worth, Texas. It was owned by Cowtown Cycles when my Dad bought it. Did you notice the reversed shift lever?



The top end on that engine if bored out, according to my mechanic, would leave "a stack of washers."

The engine with the trashed piston was in the bike. I'm not sure what happened to it. The bike was stored for 20 years or so and ran OK when it entered storage. At least I have one engine that can be rebuilt.

[eblen6882]

The transmission.



I asked Ron to take a look at the transmission because it didn't seem to be shifting correctly.

He had a hard time getting the transmission cover off. The bearings were corroded above the oil level, apparently from sitting for so long. He also found a broken clutch push rod.

He said the gears had a small amount of pitting, but should be fine for this bike.

Here's a shot of the bike on the lift, partially dismantled.



Last Friday, parts started traveling; crank to the rebuilder, paintable parts to the painter. Cast parts sent out for soda blasting, certain chrome parts to the chrome shop and wheels out to be straightened to be rebuilt with new spokes.

I didn't stop in to visit last week-end, but I plan to stop by to see how things are going later this week.

[c.d.iesel]

I have a favor to ask for another poster ( kronos ) who
is looking for a GOOD well exposed photo
up under your steering head - the frame area showing
the metal tab pointing down for the coil and horn mounting-
see his thread for the discussion - while your
tank is off and the motor out of the way -
you may provide a much needed answer -
Thanks, c.d.

http://vintagebmw.org/forums/viewtopic.php?t=1406



and thanks to US4736 fo the use of his
restoration photo - great job!!
[/img]

[eblen6882]

c.d.: The coil on the R26 is mounted on the generator. My repair manual for R26 and R27 has two different pictures of the generator assembly, one for each bike. I was going to snap a picture from the book, but the battery in my camera is dead. Its charging.

[VBMWMO]

I had my local independent shop mechanic take down my engine to check it out and rebuild as needed. I have the engine with numbers to match my frame:





The idea was to take down the engine in the bike



And rebuild using the matching numbers case. It turned out the crank has spun in the case, causing significant damage that my mechanic said couldn't be repaired. Sorry no pics, I'll take some later.

When he took down the engine in the bike, this is what he found:



The connecting rod bearings are worn



Valve seats worn:



Valve guides worn:



More later. . .