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mauricedonini
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VBMWMO #9234
Joined: 01/06/2017
Posts: 19

Hi,

Having a slinger service done on my 1966 R60/2. Hearing the bearings have spun on the crank.

Looking for recommendations for getting the crank back to within tolerance.

Thank you,

Maurice

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6424
Names that I know of for

Names that I know of for crank rebuilding are Dan at Cycleworks, but he's hammered right now and doubt he can keep to any schedule. You could check with Brent at Brent's Motorcycle Works in California as well as Chris Chambers in Huntsville, Alabama. I believe Chris is top notch.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

mauricedonini
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VBMWMO #9234
Joined: 01/06/2017
Posts: 19
Does it have to be a

Does it have to be a motorcycle shop?

Anyone use an automotive shop?

Thank you

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6424
It would have to be someone

It would have to be someone with deep understanding and expertise on building cranks. I don't know the first thing about rebuilding a crank, but /2 cranks are pretty precious and I'd want to make sure it was going to get done right.

Who's doing your slinger service? Do they have any suggestions?

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

john.b.watts
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VBMWMO #8877
Joined: 03/09/2015
Posts: 40
You really want an

You really want an experienced BMW tech. doing this work as bad results will bring you to tears down the road.

I know that Scottie Sharpe has someone he trusts as he rebuilt my engine and the spherical rear bearing had done a number on the crank surface. It went out along with a batch for hard chroming then the turn down to spec. I would trust him for certain.

dougbrashear
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VBMWMO #8334
Joined: 07/27/2012
Posts: 27
+1 for Chris Chambers. He

+1 for Chris Chambers. He inspected and rebuilt the crank on my R67/2. The crank came back to me expertly packaged in a neat wooden carrier inside the box, along with used parts returned. He sent me pictures of his inspection, too. I highly recommend the total experience with him.

Back in 2013, this is the contact information I had for him (hope he doesn't mind me passing it along):

Chris Chambers
c/o R.C. Hobbies
3303 Meridian ST. N.
Huntsville, AL. 35811-1542
256-534-5186

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1967 BMW R60/2
1952/1954 BMW R67/2
1965 Puch SGS 250

312Icarus
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Joined: 07/15/2016
Posts: 303
Scotty Sharpe is doing mine

Scotty Sharpe is doing mine as we speak...

Icarus

johnpst
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Hawaii
Joined: 03/22/2016
Posts: 70
+1 Chris Chambers or Dan Neiner

All said above but, bears repeating.

These crankshafts are 10th grade auto shop when I was a kid. Unfortunately, we haven't taught these skills in 40+ years. Craftsmen are hard to find and there ins't an app for that.

If you've ever bump started this bike, have it inspected.

These are press fit pieces that have precise alignments and fits. They need to be left to a skilled and PRACTICED craftsman.

Now, if you have an MG, , Norton, Triumph, Sunbeam, or other mid century shop around they may have the base skills and equipment to do the work but, there is a pretty steep discussion I'd have to have with them to insure they are up to speed. Everyone has an opinion on what an interference fit is. BMW has a specification. There's a difference between opinion and specification.

Dropping it in the mail is three days transit at worst and the work will probably take a week ounce you are #1 in the queue. Call the guys that know what they are doing and get a quote and lead time from them. Please remember, they stopped selling ex-ray glasses back in the 50's so, no one can know exactly what work is required but, it's a good bet to ask them what they would charge to:

Press apart, inspect, reassemble and align considering no repair work required.

Re chroming and machining crank pins?
Re chroming and machining main and crank end bearing journals?
Inspecting and honing the flywheel taper?
Inspecting and honing the generator/dynamo taper?
Balancing including con-rods, pistons, and flywheel?

They should ask you to send the crank with con-rods, pistons, clutch assy, and flywheel.

Good luck. It's well worth it to do the job right and start from a solid platform.

John

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John
55 - R50, 06-R1200RT, 96-M900, 10-TU250x

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