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Search: Posts Made By: StephenB
Forum: Airheads 10-24-2013, 08:02 PM
Replies: 28
Views: 2,190
Posted By StephenB
No separation.

No separation.
Forum: Airheads 10-24-2013, 05:42 PM
Replies: 28
Views: 2,190
Posted By StephenB
New data points

I did some more looking into what could cause my blocking the crankshaft. I found some marks that could be construed as evidence of grinding:
...
Forum: Airheads 10-21-2013, 07:12 AM
Replies: 17
Views: 1,604
Posted By StephenB
I'd appreciate that, ritetwist, I need visuals....

I'd appreciate that, ritetwist, I need visuals. You mentioned that when there is a bore that there also is a wide (not deep) relief groove in the barrel? Are there also bores in the barrel allowing...
Forum: Airheads 10-20-2013, 05:45 PM
Replies: 36
Views: 3,440
Posted By StephenB
I do know that. I just thought, cold oil higher...

I do know that. I just thought, cold oil higher pressure ... ah, here we go, there was my mistake. Colder oil -> higher pressure -> bypass. Got it.
Forum: Airheads 10-20-2013, 05:42 PM
Replies: 17
Views: 1,604
Posted By StephenB
Sorry: of course you would have to measure the...

Sorry: of course you would have to measure the jugs ... silly me. I will compare your measurements of a /7 jug with the /6 jug I have and go from there.
There is no oil passage in the jugs...
Forum: Airheads 10-20-2013, 09:30 AM
Replies: 36
Views: 3,440
Posted By StephenB
My oil pressure gauge reads up to 160psi right...

My oil pressure gauge reads up to 160psi right after start and and then settles to 10-15psi at idle and about 50-60psi at over 4000rpm with the engine warmed up.

Here's my setup using a simple...
Forum: Airheads 10-20-2013, 07:26 AM
Replies: 17
Views: 1,604
Posted By StephenB
Thanks for the input, plaka. I would appreciate...

Thanks for the input, plaka. I would appreciate if you could measure your /7 block (no need to measure pistons though) to give me an idea on the step dimensions. I can transpose that to my 97mm...
Forum: Airheads 10-19-2013, 07:47 PM
Replies: 17
Views: 1,604
Posted By StephenB
After learning about this oil channel and how it...

After learning about this oil channel and how it is connected, I will go with just one O-ring, in the same location as later /6's and /7's have it.
Forum: Airheads 10-19-2013, 07:42 PM
Replies: 17
Views: 1,604
Posted By StephenB
Yes, the bore is present on both sides. Don't...

Yes, the bore is present on both sides. Don't have the matching barrels, so not sure about corresponding features there. The ones I have a white o-ring and are 99mm, so later /6. But, the lead-in...
Forum: Airheads 10-19-2013, 11:35 AM
Replies: 17
Views: 1,604
Posted By StephenB
Question Mystery bore in engine case - not seen before?

Mystery bore location:
http://www.stephenbottcher.net/BMW/R60_5/assembly/boreincase2.jpg

Close-up:
http://www.stephenbottcher.net/BMW/R60_5/assembly/boreincase.jpg

It is a 10mm/0.4in deep...
Forum: Airheads 10-04-2013, 08:38 PM
Replies: 21
Views: 1,252
Posted By StephenB
When I got this camshaft with the front bushing I...

When I got this camshaft with the front bushing I inspected it and found areas that showed sign of oil "starvation" (too strong a word). I figured that 4 holes @90deg enables better oil distribution...
Forum: Airheads 10-04-2013, 08:16 PM
Replies: 21
Views: 1,252
Posted By StephenB
Found that out just now by trial and error. I...

Found that out just now by trial and error. I will follow the instructions in the manual for setting the axial float. Thanks anyways.
Forum: Airheads 10-04-2013, 05:49 PM
Replies: 21
Views: 1,252
Posted By StephenB
We are getting somewhere, thanks everybody, very...

We are getting somewhere, thanks everybody, very valuable information. I had already added two more oil feeder holes to the aluminum carrier, just to be on the safe side.

All handbooks refer to a...
Forum: Airheads 10-04-2013, 11:41 AM
Replies: 21
Views: 1,252
Posted By StephenB
Plaka, the one that you're referring to is made...

Plaka, the one that you're referring to is made entirely from aluminum with countersunk bores. I have one of those.

I am talking about the one that is shown in the initial post: cast iron body...
Forum: Airheads 10-04-2013, 07:42 AM
Replies: 21
Views: 1,252
Posted By StephenB
Question Early style /5 camshaft support bushings

I have an earlier style /5 camshaft support housing with bronze bushing that I would like to utilize in my 72 /5 engine block.

Photo (c) Motoren Israel
...
Forum: Airheads 10-01-2013, 05:15 AM
Replies: 28
Views: 2,190
Posted By StephenB
Brand new tensioner, smooth as baby skin, not...

Brand new tensioner, smooth as baby skin, not grooved.
Forum: Airheads 09-30-2013, 07:27 PM
Replies: 28
Views: 2,190
Posted By StephenB
Both statements make sense, but the overhung...

Both statements make sense, but the overhung situation is overrated in my opinion, given how over-engineered these engines are. I bet you it'll work fine. But the oil situation can not be...
Forum: Airheads 09-30-2013, 10:48 AM
Replies: 28
Views: 2,190
Posted By StephenB
This is indeed what baffles me too. I got...

This is indeed what baffles me too.

I got the advise to use the outer rather than the inner sprockets for my single row chain setup. I can't see that making a difference but it is easy enough to...
Forum: Airheads 09-30-2013, 05:54 AM
Replies: 28
Views: 2,190
Posted By StephenB
I am using the inner most gear of the dual...

I am using the inner most gear of the dual sprocket. If there was something binding you would expect it to bind when using the outer sprocket. Since this is only a fraction of a revolution of the 4...
Forum: Airheads 09-30-2013, 05:26 AM
Replies: 28
Views: 2,190
Posted By StephenB
Yes.

Yes.
Forum: Airheads 09-29-2013, 06:55 PM
Replies: 28
Views: 2,190
Posted By StephenB
I am using the dual row /5 sprocket. I like the...

I am using the dual row /5 sprocket. I like the idea of removing the bearing and see if that fixes the problem. But I am sure it sits fully seated. I looked (timing cover is off again), there is no...
Forum: Airheads 09-29-2013, 06:44 PM
Replies: 28
Views: 2,190
Posted By StephenB
Yes.

Yes.
Forum: Airheads 09-29-2013, 06:43 PM
Replies: 28
Views: 2,190
Posted By StephenB
I am using everything /5 except for the single...

I am using everything /5 except for the single row chain. I assembled the timing cover twice, both times with the same results. I looked for mechanical damage, pressure marks, abrasion etc and came...
Forum: Airheads 09-29-2013, 06:23 PM
Replies: 28
Views: 2,190
Posted By StephenB
I did. How do you think it could jam the bearing?

I did. How do you think it could jam the bearing?
Forum: Airheads 09-29-2013, 03:32 PM
Replies: 28
Views: 2,190
Posted By StephenB
Barrels and conrods are off (so you could see if...

Barrels and conrods are off (so you could see if the thrust washer was off), the flywheel is assembled and turns, so no, the thrust washer didn't come off.
Forum: Airheads 09-29-2013, 02:57 PM
Replies: 28
Views: 2,190
Posted By StephenB
Weird problem : timing cover assembly blocks crankshaft

I am in the process of assemblying a 600cc engine with parts that originally did not came from the same engine. The block is from 03/72, the crankshaft and the camshaft (284deg) are both from /5/6 ...
Forum: Airheads 09-28-2013, 09:36 AM
Replies: 9
Views: 774
Posted By StephenB
Plaka, do you have by any chance a /7 barrel...

Plaka, do you have by any chance a /7 barrel where you can measure the o-ring groove dimensions?
Forum: Airheads 09-28-2013, 09:22 AM
Replies: 9
Views: 774
Posted By StephenB
Plaka, I have the original matching "C"...

Plaka,

I have the original matching "C" pistons and wrist pins and the barrel is already honed. Machining doesn't cost me much and my guy is local, so modifying the barrels is my "sensible"...
Forum: Airheads 09-28-2013, 08:44 AM
Replies: 9
Views: 774
Posted By StephenB
Plaka, These are 600cc jugs. Don't want to...

Plaka,

These are 600cc jugs. Don't want to machine the block, like to keep that original.

With 97mm OD at the foot of the barrel and a 73mm piston bore, the wall thickness is about 1/2in....
Forum: Airheads 09-28-2013, 06:19 AM
Replies: 9
Views: 774
Posted By StephenB
Modifying post-75 /6 barrels (w/ white o-ring) to fit /5 block

This is a bridge I haven't crossed before:

What I have is a /6 barrel with 99mm spigot and a white o-ring (a "C", a "6" and Mahle imprint with a "77" embossed on the foot of the barrel) and a /5...
Forum: Airheads 09-21-2013, 02:34 PM
Replies: 41
Views: 3,726
Posted By StephenB
I used the stock filler plug off the monolever...

I used the stock filler plug off the monolever final drive as a template (the vented one that Plaka showed in the thread above) to fabricate a stainless female-female M18x1.5 / M10x1.0 adapter for...
Forum: Airheads 08-31-2013, 06:33 AM
Replies: 10
Views: 1,200
Posted By StephenB
Awww ... that sux. All the best and a speedy...

Awww ... that sux. All the best and a speedy recovery. You see, you are alive and that is all that counts ... material damage can be repaired/replaced.

Just wondered, did you do any work on your...
Forum: Airheads 08-28-2013, 05:53 AM
Replies: 32
Views: 1,838
Posted By StephenB
There is another variable in the equation that I...

There is another variable in the equation that I haven't seen mentioning: if the cylinder studs are left too long (coming out the engine block) and very lightly (not much is required) touch the...
Forum: Airheads 08-20-2013, 05:27 AM
Replies: 4
Views: 480
Posted By StephenB
Thanks ever so much guys. Your responses make...

Thanks ever so much guys. Your responses make absolute sense to me and I will build accordingly.

Stephen
Forum: Airheads 08-19-2013, 06:45 PM
Replies: 4
Views: 480
Posted By StephenB
Question Valve length R60/5 vs R60/7

I have ordered valves for a 1972 R60/5. They came with total length dimension as specified for the R60/7 which ins 1mm longer for both IN and EX.

Specs overall valve length for 1971-1972 R60/5:...
Forum: Airheads 07-31-2013, 06:21 PM
Replies: 7
Views: 874
Posted By StephenB
Yeah, that was quite an adventure for him,...

Yeah, that was quite an adventure for him, especially the mud sections in OK. His bike now resides in my garage for a RS conversion.
Forum: Airheads 07-31-2013, 06:32 AM
Replies: 7
Views: 874
Posted By StephenB
Yep, mono swingarm, driveshaft WITH cush ... I...

Yep, mono swingarm, driveshaft WITH cush ... I think I moved the swingarm a wee bit to the left (using the pivot pins) to clear the driveshaft from hitting the swingarm on the inside. I checked later...
Forum: Airheads 07-27-2013, 08:03 AM
Replies: 4
Views: 520
Posted By StephenB
You don't say what bike. On a bike with the...

You don't say what bike.

On a bike with the 2 6V coils under the tank (5/6/7 up to '84) there might be one of the coil terminals (the one that is connected to the rpm gauge) shortened constantly...
Forum: Airheads 07-25-2013, 11:18 AM
Replies: 17
Views: 1,805
Posted By StephenB
It'll run just fine with a 3Ohm coil, you...

It'll run just fine with a 3Ohm coil, you wouldn't know the difference.
Forum: Airheads 07-25-2013, 09:39 AM
Replies: 99
Views: 8,862
Posted By StephenB
Build from parts, not a refurb. Cost: I'd...

Build from parts, not a refurb.

Cost: I'd rather not say ( = 10k+)


http://www.stephenbottcher.net/BMW/R100ST/final/P1010870.JPG...
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