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Recommended machinist for BSA T/S bush #40275
07/01/08 5:52 pm
07/01/08 5:52 pm
Joined: Jan 2006
Posts: 7,059
Laredo (South) Texas, USA
GrandPaul Online content OP
BritBike Forum member
GrandPaul  Online Content OP
BritBike Forum member

Joined: Jan 2006
Posts: 7,059
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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Re: Recommended machinist for BSA T/S bush #40276
07/01/08 9:37 pm
07/01/08 9:37 pm
Joined: Apr 2005
Posts: 2,410
Bega NSW Australia
Mark Parker Offline
BritBike Forum member
Mark Parker  Offline
BritBike Forum member

Joined: Apr 2005
Posts: 2,410
Bega NSW Australia
Paul, this works quite well, though I wouldn't use a bush myself, I think they are false economy.





mark
Re: Recommended machinist for BSA T/S bush #40277
07/01/08 11:20 pm
07/01/08 11:20 pm
Joined: Jan 2006
Posts: 7,059
Laredo (South) Texas, USA
GrandPaul Online content OP
BritBike Forum member
GrandPaul  Online Content OP
BritBike Forum member

Joined: Jan 2006
Posts: 7,059
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"
Re: Recommended machinist for BSA T/S bush #40278
07/01/08 11:37 pm
07/01/08 11:37 pm
Joined: Jan 2003
Posts: 523
San Diego, CA
Will S. Offline
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Will S.  Offline
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Joined: Jan 2003
Posts: 523
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
Re: Recommended machinist for BSA T/S bush #40279
07/02/08 8:50 am
07/02/08 8:50 am
Joined: Apr 2005
Posts: 2,410
Bega NSW Australia
Mark Parker Offline
BritBike Forum member
Mark Parker  Offline
BritBike Forum member

Joined: Apr 2005
Posts: 2,410
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
Re: Recommended machinist for BSA T/S bush #40280
07/03/08 1:51 am
07/03/08 1:51 am
Joined: Aug 2001
Posts: 3,884
Cape Carteret, NC
M
Mr Mike Offline
BritBike Forum member
Mr Mike  Offline
BritBike Forum member
M

Joined: Aug 2001
Posts: 3,884
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

Re: Recommended machinist for BSA T/S bush #40281
07/03/08 3:12 am
07/03/08 3:12 am
Joined: Sep 2004
Posts: 269
E
EWebster Offline
BritBike Forum member
EWebster  Offline
BritBike Forum member
E

Joined: Sep 2004
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

Re: Recommended machinist for BSA T/S bush #40282
07/03/08 1:12 pm
07/03/08 1:12 pm
Joined: Aug 2001
Posts: 3,884
Cape Carteret, NC
M
Mr Mike Offline
BritBike Forum member
Mr Mike  Offline
BritBike Forum member
M

Joined: Aug 2001
Posts: 3,884
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

Re: Recommended machinist for BSA T/S bush #40283
07/03/08 1:38 pm
07/03/08 1:38 pm
Joined: Mar 2006
Posts: 3,748
gastonia nc
R
raf940 Online content
BritBike Forum member
raf940  Online Content
BritBike Forum member
R

Joined: Mar 2006
Posts: 3,748
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
Re: Recommended machinist for BSA T/S bush #40284
07/03/08 2:21 pm
07/03/08 2:21 pm
Joined: Jan 2006
Posts: 7,059
Laredo (South) Texas, USA
GrandPaul Online content OP
BritBike Forum member
GrandPaul  Online Content OP
BritBike Forum member

Joined: Jan 2006
Posts: 7,059
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"
Re: Recommended machinist for BSA T/S bush #40285
07/05/08 1:15 pm
07/05/08 1:15 pm
Joined: Aug 2001
Posts: 3,884
Cape Carteret, NC
M
Mr Mike Offline
BritBike Forum member
Mr Mike  Offline
BritBike Forum member
M

Joined: Aug 2001
Posts: 3,884
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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