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#40275 - 07/01/08 5:52 pm Recommended machinist for BSA T/S bush  
Joined: Jan 2006
Posts: 6,645
GrandPaul Online content
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GrandPaul  Online Content
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Joined: Jan 2006
Posts: 6,645
Laredo (South) Texas, USA
I've looked for a while and can't find the name of a reputable machinist that several bb.com members have all used for the alignment boring for the timing side bush.

My local machinist has never failed me 'till now, he doesn't have a jig that will allow him to do the job with 100% certainty.

'68 BSA 650 (client bike)


GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
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#40276 - 07/01/08 9:37 pm Re: Recommended machinist for BSA T/S bush  
Joined: Apr 2005
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Mark Parker Offline
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Mark Parker  Offline
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Joined: Apr 2005
Posts: 2,332
Bega NSW Australia
Paul, this works quite well, though I wouldn't use a bush myself, I think they are false economy.





mark
#40277 - 07/01/08 11:20 pm Re: Recommended machinist for BSA T/S bush  
Joined: Jan 2006
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GrandPaul Online content
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GrandPaul  Online Content
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Joined: Jan 2006
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Laredo (South) Texas, USA
What is the false economy in a good modern bushing, properly installed, for typical road use (not racing)?


GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
#40278 - 07/01/08 11:37 pm Re: Recommended machinist for BSA T/S bush  
Joined: Jan 2003
Posts: 522
Will S. Offline
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Will S.  Offline
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San Diego, CA
No first hand experience but I've been told by a guy that has built a lot of BSA motors that Wakula Racing has the tools and know-how to do it:

http://www.wakularacing.com/


Will S.
BSAs: '66 & '69 Lightning
Triumphs: '68 TR6R, '68 Bonneville, '73 TR7, '55 6T
'71 Norton Commando

www.britironsd.com
#40279 - 07/02/08 8:50 am Re: Recommended machinist for BSA T/S bush  
Joined: Apr 2005
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Mark Parker Offline
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Mark Parker  Offline
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Posts: 2,332
Bega NSW Australia
Paul, why I think the bush is false economy, and it's just my opinion, is because even when not racing they have not been all that reliable for me, and my brother's bike with a bush, did a rod bearing last year. I've never had a rod bearing problem with a roller conversion and end feed, and the difference in cost isn't all that much when you consider the bottom end will likely be good for 100,000Miles+, and next time you replace it it's simple.
Plain bearings may be good but I don't think that one's good in that, esp with the way oil is meant to go into the crank, also it looks small in dia. Maybe my perspective is different but the last rear tyre I put on a bike was $300.


mark
#40280 - 07/03/08 1:51 am Re: Recommended machinist for BSA T/S bush  
Joined: Aug 2001
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Mr Mike Offline
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Mr Mike  Offline
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Cape Carteret, NC
GP,
I have a guy here in NC that has a lab grade vertical jig boring machine. He has done a couple for A65 plain bearings for me and the results on both motors were excellent. It is kind of a long way to ship a bottom end though.
I am not a fan of reaming. It will size the hole ok, but will not ensure the bore is perfectly true.

Mr Mike

#40281 - 07/03/08 3:12 am Re: Recommended machinist for BSA T/S bush  
Joined: Sep 2004
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EWebster Offline
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Posts: 269
Quote:
lab grade vertical jig boring machine.
What makes the machine "lab grade"?


The brass alloy in the "ream-able" replacement bush is hardly lab grade unless you are talking Retriever smile

#40282 - 07/03/08 1:12 pm Re: Recommended machinist for BSA T/S bush  
Joined: Aug 2001
Posts: 3,871
Mr Mike Offline
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Mr Mike  Offline
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Cape Carteret, NC
E Webster,
When I asked that question of my machinist he used that word "lab grade". He said it was a small machine that had been designed and built for the fabrication of small parts for lab testing equipment. He claims very high accuracy within .0001-2 on an aligh bore. The bush had a near mirror finish when it was done and assembled beautifully with .0015 clearance.

That was my experience with this shop that does all kinds of race work on everything from drag racers to outboards to pulling tractors. He showed me the setup procedure he would use for the A65. I ran the setup by my brother who is a tool maker by trade and I was convinced that I would get a good job. I wasn't disappointed. the guy does no advertising and and his shop is backed up. Took me several weeks to get a head done.

Mr Mike

#40283 - 07/03/08 1:38 pm Re: Recommended machinist for BSA T/S bush  
Joined: Mar 2006
Posts: 3,648
raf940 Offline
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raf940  Offline
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Joined: Mar 2006
Posts: 3,648
gastonia nc
Mr. Mike...who is he?? where in NC??


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando project
#40284 - 07/03/08 2:21 pm Re: Recommended machinist for BSA T/S bush  
Joined: Jan 2006
Posts: 6,645
GrandPaul Online content
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GrandPaul  Online Content
BritBike Forum member

Joined: Jan 2006
Posts: 6,645
Laredo (South) Texas, USA
Hey, Webster, I like that Lab reference. My late brother was a lab NUT. always had some pair of Yellow & Choclate, Black & Yellow, whatever.

Anyway, I've received some input from here and other sources, and i'm dealing with my buddy's cases accordingly.

The best thing is that this engine was not a "blown up" unit, so putting it right (so that it STAYS right) won't need to involve too much rocket science or extravaggant measures.


GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
#40285 - 07/05/08 1:15 pm Re: Recommended machinist for BSA T/S bush  
Joined: Aug 2001
Posts: 3,871
Mr Mike Offline
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Mr Mike  Offline
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Joined: Aug 2001
Posts: 3,871
Cape Carteret, NC
Raf,
Edge Brothers Machine Shop, Wayne abd Earl. Wayne does the head work and Earl does the boring, crankwork and block work. The are located in jacksonville, NC. (919) 219-7817. Earl has done my bushings on A65 and Wayne did a head for me on a B50. Wayne resleeves worn guides rather than replaceing them. All work came out excellent.

Mike


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